{"id":38037,"date":"2026-04-09T14:11:06","date_gmt":"2026-04-09T07:11:06","guid":{"rendered":"https:\/\/times.edu.vn\/?p=38037"},"modified":"2026-04-09T14:11:06","modified_gmt":"2026-04-09T07:11:06","slug":"igcse-waves-questions","status":"publish","type":"post","link":"https:\/\/times.edu.vn\/en\/igcse\/igcse-waves-questions\/","title":{"rendered":"IGCSE Waves Questions 2026: How to Answer Common Exam Problems More Clearly and Accurately"},"content":{"rendered":"<p><strong><a href=\"https:\/\/times.edu.vn\/en\/igcse\/what-is-igcse-a-comprehensive-guide-for-students\/\">IGCSE<\/a><\/strong><strong>\u00a0waves questions<\/strong>\u00a0test whether you can apply core wave ideas\u2014not just recall definitions\u2014under exam conditions.<\/p>\n<p>They focus on amplitude and wavelength, using the wave equation v=f\u03bbv=f\u03bb (and f=1\/Tf=1\/T), and explaining transverse vs longitudinal waves with correct diagrams, including wavefronts, compression, and rarefaction.<\/p>\n<p>High-frequency topics include reflection, refraction (frequency constant; speed and wavelength change), diffraction, and the electromagnetic spectrum.<\/p>\n<p>Strong answers also cover refractive index, the critical angle, and total internal reflection with precise mark-scheme language.<\/p>\n<h2><strong>Essential IGCSE Waves Questions For Exam Preparation<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-38074\" src=\"https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/1-12.webp\" alt=\"IGCSE Waves Questions 2026: How to Answer Common Exam Problems More Clearly and Accurately\" width=\"1000\" height=\"558\" srcset=\"https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/1-12.webp 1000w, https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/1-12-300x167.webp 300w, https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/1-12-768x429.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>IGCSE waves questions are not \u201ctopic checks\u201d; they are exam-engineered prompts designed to expose whether you can connect definitions, diagrams, and calculations under time pressure.<\/p>\n<p>Based on our years of practical tutoring at Times Edu, the fastest score gains come from mastering a small set of recurring question templates: Reading wave graphs, using the wave equation, describing refraction with correct direction language, and distinguishing transverse and longitudinal particle motion.<\/p>\n<p>A critical detail most students overlook in the 2026 exam cycle is that many borderline candidates lose marks not because the physics is \u201chard,\u201d but because their explanations are imprecise.<\/p>\n<p>Examiners reward exact statements like \u201cfrequency stays constant at a boundary\u201d and penalize vague language like \u201cthe wave slows down so it bends\u201d without stating towards\u00a0or away from the normal.<\/p>\n<h3><strong>What examiners actually reward in IGCSE waves questions<\/strong><\/h3>\n<ul>\n<li><strong>Correct quantities, correct units<\/strong>: Hertz (Hz) for frequency, metres (m) for wavelength, metres per second (m\/s) for wave speed.<\/li>\n<li><strong>Diagram literacy<\/strong>: You must label amplitude, wavelength, wavefront direction, and the normal line when discussing refraction.<\/li>\n<li><strong>Boundary rules<\/strong>: At a boundary, <strong>frequency stays constant<\/strong>; <strong>speed and wavelength may change<\/strong>.<\/li>\n<li><strong>Language precision<\/strong>: \u201crefracts towards the normal\u201d is different from \u201cchanges direction.\u201d<\/li>\n<\/ul>\n<h3><strong>Common misconceptions that repeatedly cost marks<\/strong><\/h3>\n<ul>\n<li><strong>Confusing amplitude with wavelength<\/strong>: Amplitude is vertical displacement (or maximum disturbance), wavelength is horizontal distance between corresponding points.<\/li>\n<li><strong>Thinking frequency changes when a wave enters glass<\/strong>: For light, the frequency remains constant; speed and wavelength change.<\/li>\n<li><strong>Mixing up wave speed and particle speed<\/strong>: Particles oscillate; the disturbance travels.<\/li>\n<li><strong>Using \u201clouder\u201d to describe frequency<\/strong>: Loudness relates to amplitude; pitch relates to frequency (Hz).<\/li>\n<li><strong>Calling sound transverse<\/strong>: Sound in air is longitudinal with alternating compression and rarefaction.<\/li>\n<\/ul>\n<h3><strong>Grade boundaries and strategy (how to study like a high-achiever)<\/strong><\/h3>\n<p>Grade boundaries vary by board, paper difficulty, and session, so you should treat them as moving targets rather than fixed cut-offs.<\/p>\n<p>From our direct experience with international school curricula, a safer approach is to set skill-based targets: Perfect the \u201ceasy marks\u201d (definitions, units, diagram labels), then secure the calculation marks, then refine explanations to match the mark scheme language.<\/p>\n<p>The pedagogical approach we recommend for high-achievers is:<\/p>\n<ul>\n<li>Build a <strong>one-page waves toolkit<\/strong>\u00a0(definitions, equations, boundary rules, EM spectrum order, refraction wording).<\/li>\n<li>Drill <strong>mixed question sets<\/strong>\u00a0(not topic-by-topic only), because exams are mixed.<\/li>\n<li>Mark your work using \u201cmark-point matching\u201d: Each sentence should earn a mark.<\/li>\n<\/ul>\n<p><strong style=\"color: #f00;\">&gt;&gt;&gt; Read more:<\/strong> <a class=\"xem-them-link\" href=\"https:\/\/times.edu.vn\/en\/igcse\/igcse-energy-changes-questions\/\">IGCSE Energy Changes Questions<\/a> 2026: How to Tackle Exothermic and Endothermic Topics Step by Step<\/p>\n<h2><strong>Properties Of Transverse And Longitudinal Waves<\/strong><\/h2>\n<p>IGCSE waves questions often start with wave identification, but the marks come from your reasoning: The direction of particle motion, the presence of compression\/rarefaction, and how diagrams represent these ideas.<\/p>\n<h3><strong>Core properties you must state without hesitation<\/strong><\/h3>\n<ul>\n<li><strong>Amplitude<\/strong>: Maximum displacement from equilibrium (or maximum disturbance).<\/li>\n<li><strong>Wavelength<\/strong>: Distance between two consecutive points in phase (crest-to-crest, trough-to-trough, compression-to-compression).<\/li>\n<li><strong>Frequency (Hertz)<\/strong>: Number of oscillations per second.<\/li>\n<li><strong>Period (T)<\/strong>: Time for one oscillation; f=1Tf=T1\u200b.<\/li>\n<li><strong>Wavefront<\/strong>: A\u00a0line (or surface) joining points on a wave that are in phase; wave travels perpendicular to wavefronts.<\/li>\n<\/ul>\n<h3><strong>Transverse vs longitudinal: <\/strong><strong>T<\/strong><strong>he mark-scheme comparison<\/strong><\/h3>\n<table>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\"><strong>Feature<\/strong><\/th>\n<th colspan=\"1\" rowspan=\"1\"><strong>Transverse waves<\/strong><\/th>\n<th colspan=\"1\" rowspan=\"1\"><strong>Longitudinal waves<\/strong><\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Particle motion<\/td>\n<td colspan=\"1\" rowspan=\"1\">Perpendicular to direction of travel<\/td>\n<td colspan=\"1\" rowspan=\"1\">Parallel to direction of travel<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Key diagram features<\/td>\n<td colspan=\"1\" rowspan=\"1\">Crests and troughs<\/td>\n<td colspan=\"1\" rowspan=\"1\">Compression and rarefaction<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Typical examples in IGCSE<\/td>\n<td colspan=\"1\" rowspan=\"1\">Light, water surface waves<\/td>\n<td colspan=\"1\" rowspan=\"1\">Sound in air, ultrasound<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">Polarisation<\/td>\n<td colspan=\"1\" rowspan=\"1\">Possible<\/td>\n<td colspan=\"1\" rowspan=\"1\">Not possible in air<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>A critical detail most students overlook in the 2026 exam cycle is that if a question asks for \u201cevidence from the diagram,\u201d you must reference the diagram feature\u00a0(crest\/trough or compression\/rarefaction), not only the definition. Examiners expect you to \u201cread\u201d the wave representation.<\/p>\n<h3><strong>Sound, ultrasound, and pressure language<\/strong><\/h3>\n<p>Sound waves in air are longitudinal and propagate through alternating <strong>compression<\/strong>\u00a0(high pressure, particles close together) and <strong>rarefaction<\/strong>\u00a0(low pressure, particles spread out). Ultrasound is simply sound at very high frequency (above human hearing), and IGCSE questions use it to test your understanding of reflection and time-of-flight methods.<\/p>\n<p>Practical phrasing that earns marks:<\/p>\n<ul>\n<li>\u201cSound is a longitudinal wave consisting of compressions and rarefactions.\u201d<\/li>\n<li>\u201cPitch increases with frequency (Hz); loudness increases with amplitude.\u201d<\/li>\n<\/ul>\n<p><strong style=\"color: #f00;\">&gt;&gt;&gt; Read more:<\/strong> <a class=\"xem-them-link\" href=\"https:\/\/times.edu.vn\/en\/igcse\/igcse-genetics-questions\/\">IGCSE Genetics Questions<\/a> 2026: A Simple Guide to Solving Inheritance Problems with Confidence<\/p>\n<h2><strong>Calculations Using The Wave Equation And Frequency<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-38076\" src=\"https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/2-12.webp\" alt=\"IGCSE Waves Questions 2026: How to Answer Common Exam Problems More Clearly and Accurately\" width=\"1000\" height=\"558\" srcset=\"https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/2-12.webp 1000w, https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/2-12-300x167.webp 300w, https:\/\/times.edu.vn\/wp-content\/uploads\/2026\/04\/2-12-768x429.webp 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>The wave equation is a guaranteed scoring zone in IGCSE waves questions, provided you control units and interpret what the question is really asking.<\/p>\n<h3><strong>The wave equation and what it really means<\/strong><\/h3>\n<p>V=f\u03bbv=f\u03bb<\/p>\n<p>This is a relationship between wave speed vv, frequency ff (in Hertz), and wavelength \u03bb\u03bb. It applies to all waves, including water waves, sound, and electromagnetic waves.<\/p>\n<p>Most calculation errors come from:<\/p>\n<ul>\n<li>Using ff in kHz or MHz without converting to Hz,<\/li>\n<li>Using wavelength in cm or nm without converting to metres,<\/li>\n<li>Rearranging incorrectly under time pressure.<\/li>\n<\/ul>\n<h3><strong>High-frequency units: <\/strong><strong>C<\/strong><strong>onvert like a professional<\/strong><\/h3>\n<table>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\"><strong>Prefix<\/strong><\/th>\n<th colspan=\"1\" rowspan=\"1\"><strong>Meaning<\/strong><\/th>\n<th colspan=\"1\" rowspan=\"1\"><strong>Example<\/strong><\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">kHz<\/td>\n<td colspan=\"1\" rowspan=\"1\">103103 Hz<\/td>\n<td colspan=\"1\" rowspan=\"1\">3.0 kHz = 3000 Hz<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">MHz<\/td>\n<td colspan=\"1\" rowspan=\"1\">106106 Hz<\/td>\n<td colspan=\"1\" rowspan=\"1\">100 MHz = 1.0\u00d71081.0\u00d7108 Hz<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">GHz<\/td>\n<td colspan=\"1\" rowspan=\"1\">109109 Hz<\/td>\n<td colspan=\"1\" rowspan=\"1\">2.4 GHz = 2.4\u00d71092.4\u00d7109 Hz<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><strong>Exam-style templates you should master<\/strong><\/h3>\n<p><strong>Template 1: Find wave speed from frequency and wavelength<\/strong><\/p>\n<p>If f=50 Hzf=50 Hz and \u03bb=0.40 m\u03bb=0.40 m, then<br \/>\nv=f\u03bb=50\u00d70.40=20 m\/sv=f\u03bb=50\u00d70.40=20 m\/s.<\/p>\n<p><strong>Template 2: Find frequency from wave speed and wavelength<\/strong><\/p>\n<p>If v=330 m\/sv=330 m\/s and \u03bb=0.66 m\u03bb=0.66 m, then<br \/>\nf=v\u03bb=3300.66=500 Hzf=\u03bbv\u200b=0.66330\u200b=500 Hz.<\/p>\n<p><strong>Template 3: Use period and frequency<\/strong><\/p>\n<p>If the period T=0.020 sT=0.020 s, then<br \/>\nf=1T=10.020=50 Hzf=T1\u200b=0.0201\u200b=50 Hz.<\/p>\n<h3><strong>Wavefront questions: <\/strong><strong>H<\/strong><strong>ow to score the diagram marks<\/strong><\/h3>\n<p>If you\u2019re shown <strong>wavefronts<\/strong>\u00a0approaching a boundary, remember:<\/p>\n<ul>\n<li>Wave\u00a0travels <strong>perpendicular<\/strong>\u00a0to the wavefronts.<\/li>\n<li>If speed decreases, wavefront spacing (wavelength) decreases.<\/li>\n<li>If the wave slows down entering a denser medium, it bends <strong>towards the normal<\/strong>.<\/li>\n<\/ul>\n<p>A critical detail most students overlook in the 2026 exam cycle is that wavefront diagrams are often used as a \u201cconcept trap.\u201d Students draw wavefronts correctly but forget to draw the <strong>ray direction<\/strong>\u00a0(or forget the normal), losing straightforward marks.<\/p>\n<p><strong style=\"color: #f00;\">&gt;&gt;&gt; Read more:<\/strong> <a class=\"xem-them-link\" href=\"https:\/\/times.edu.vn\/en\/igcse\/igcse-biology-compare-questions\/\">IGCSE Biology Compare Questions<\/a> 2026: How to Write Clear Comparisons and Score More Marks<\/p>\n<h2><strong>Understanding Reflection Refraction And Diffraction<\/strong><\/h2>\n<p>This is where IGCSE waves questions separate high scorers from mid scorers. Many students can say the words; fewer can describe the conditions and outcomes with the exact constraints examiners mark.<\/p>\n<h3><strong>Reflection: <\/strong><strong>W<\/strong><strong>hat to write every time<\/strong><\/h3>\n<p>Reflection is the bouncing back of a wave at a boundary. For light, it follows:<\/p>\n<ul>\n<li><strong>Angle of incidence = angle of reflection<\/strong>\u00a0(measured from the normal).<\/li>\n<li>The incident ray, normal, and reflected ray are in the same plane.<\/li>\n<\/ul>\n<p>For sound and ultrasound, reflection explains echoes and imaging. If a question asks for a method, you often score with structured steps and correct control variables.<\/p>\n<h3><strong>Refraction: <\/strong><strong>T<\/strong><strong>he boundary rules that always apply<\/strong><\/h3>\n<p>Refraction is the change in direction of a wave due to a change in speed when entering a different medium.<\/p>\n<p>Mark-winning rules:<\/p>\n<ul>\n<li><strong>Frequency remains constant<\/strong>\u00a0at the boundary.<\/li>\n<li>If wave speed decreases, wavelength decreases.<\/li>\n<li>Slowing down causes bending <strong>towards the normal<\/strong>; speeding up causes bending <strong>away from the normal<\/strong>.<\/li>\n<\/ul>\n<h4><strong>Refractive index and calculations<\/strong><\/h4>\n<p>Refractive index nn is commonly tested with:<\/p>\n<p>N=sin\u2061isin\u2061rn=sinrsini\u200b<\/p>\n<p>Or in some syllabuses,<\/p>\n<p>N=cvn=vc\u200b<\/p>\n<p>Where cc is the speed of light in vacuum and vv is the speed in the medium.<\/p>\n<p>Students lose marks by:<\/p>\n<ul>\n<li>Using angles from the surface instead of from the normal,<\/li>\n<li>Swapping ii and rr,<\/li>\n<li>Forgetting that nn is dimensionless.<\/li>\n<\/ul>\n<h3><strong>Critical angle and total internal reflection: <\/strong><strong>T<\/strong><strong>he high-yield pair<\/strong><\/h3>\n<p>These are heavily examined because they combine a definition, a diagram, and a condition.<\/p>\n<p><strong>Critical angle<\/strong>: The angle of incidence in the denser medium for which the angle of refraction is 90\u00b0.<\/p>\n<p><strong>Total internal reflection<\/strong>\u00a0occurs when:<\/p>\n<ol start=\"1\">\n<li>The wave travels from a <strong>higher refractive index<\/strong>\u00a0medium to a <strong>lower refractive index<\/strong>\u00a0medium, and<\/li>\n<li>The angle of incidence is <strong>greater than the critical angle<\/strong>.<\/li>\n<\/ol>\n<p>This links directly to optical fibres in exam questions. If you describe optical fibres, include the words <strong>total internal reflection<\/strong>\u00a0and <strong>critical angle<\/strong>\u00a0explicitly.<\/p>\n<h3><strong>Diffraction: <\/strong><strong>W<\/strong><strong>hen it is \u201csignificant\u201d<\/strong><\/h3>\n<p>Diffraction is the spreading of waves around obstacles or through gaps. In IGCSE waves questions, the phrase \u201csignificant diffraction\u201d is the clue.<\/p>\n<p>Rules to state:<\/p>\n<ul>\n<li>Diffraction is greatest when the gap size is <strong>similar to the wavelength<\/strong>.<\/li>\n<li>Shorter wavelength waves diffract less for the same gap.<\/li>\n<li>Water waves and sound are common examples because their wavelengths can be comparable to everyday gaps.<\/li>\n<\/ul>\n<p><strong style=\"color: #f00;\">&gt;&gt;&gt; Read more:<\/strong> <a class=\"xem-them-link\" href=\"https:\/\/times.edu.vn\/en\/igcse\/igcse-sequences-questions\/\">IGCSE Sequences Questions<\/a> 2026: How to Spot Patterns and Answer with More Confidence<\/p>\n<h2><strong>Frequently Asked Questions<\/strong><\/h2>\n<div class=\"hoi-dap-thok-new low-faq\">\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>What are the characteristics of transverse waves?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">\n<p>Transverse waves have oscillations perpendicular to the direction of travel, and they can be described using amplitude and wavelength from a crest\u2013trough diagram.Light is the standard IGCSE example, and wavefronts can represent the same idea as lines of constant phase.<\/p>\n<\/div>\n<\/div>\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>How do you use the wave equation v = f x lambda?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">\n<p>Rearrange v=f\u03bbv=f\u03bb based on the unknown, then convert everything into SI units before substituting.Based on our years of practical tutoring at Times Edu, the most common fix is converting frequency into Hertz and wavelength into metres first, then calculating and rounding sensibly.<\/p>\n<\/div>\n<\/div>\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>What happens to a wave during refraction?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">The wave changes direction because its speed changes at the boundary, while its frequency stays constant. If the wave slows down in the new medium, it bends towards the normal and its wavelength decreases.<\/div>\n<\/div>\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>What is the difference between frequency and period?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">Frequency (in Hertz) is the number of oscillations per second, while period is the time for one oscillation. They are inverses: F=1Tf=T1\u200b, so a larger period means a smaller frequency.<\/div>\n<\/div>\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>How do sound waves differ from light waves?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">\n<p>Sound in air is a longitudinal wave made of compression and rarefaction and requires a medium to travel.Light is a transverse electromagnetic wave and can travel through a vacuum, and its position in the electromagnetic spectrum depends on frequency and wavelength.<\/p>\n<\/div>\n<\/div>\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>What is the electromagnetic spectrum in IGCSE Physics?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">\n<p>The electromagnetic spectrum is the full range of electromagnetic radiation ordered by frequency or wavelength: Radio, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays.IGCSE waves questions often test the order, relative wavelength\/frequency, and practical uses.<\/p>\n<\/div>\n<\/div>\n<div class=\"thong-tin-dai\">\n<p class=\"tit-dai\"><strong>How do you calculate the refractive index?<\/strong><\/p>\n<div class=\"chi-tiet-thong-tin\">Use n=sin\u2061isin\u2061rn=sinrsini\u200b with angles measured from the normal, not the surface. Some specifications also use n=cvn=vc\u200bwhen speed in a medium is provided, and nn has no unit.<\/div>\n<\/div>\n<\/div>\n<h4>Conclusion<\/h4>\n<p>From our direct experience with international school curricula, students improve fastest when tutoring focuses on \u201cexam language\u201d as much as physics.<\/p>\n<p>We train students to write two-mark explanations in two precise sentences, to draw wavefront and refraction diagrams that match mark schemes, and to secure calculation marks with a repeatable unit-conversion routine.<\/p>\n<p>If you want a personalized plan, <a href=\"https:\/\/times.edu.vn\/en\/\">Times Edu<\/a>\u00a0can map your current level to a target grade, choose the right subject combination for your wider study-abroad profile, and build a weekly routine that matches your exam board (CAIE 0625 <sup><a href=\"#tooltip-ref-1\" class=\"tooltip-link\" data-tooltip=\"https:\/\/www.cambridgeinternational.org\/programmes-and-qualifications\/cambridge-igcse-physics-0625\/\">[1]<\/a><\/sup>\u00a0or Edexcel <sup><a href=\"#tooltip-ref-2\" class=\"tooltip-link\" data-tooltip=\"https:\/\/qualifications.pearson.com\/en\/about-us\/qualification-brands\/edexcel.html\">[2]<\/a><\/sup>).<\/p>\n<p>Reach out for a 1:1 academic roadmap consultation and we will diagnose exactly which wave skills are limiting your score\u2014and fix them with targeted practice.<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;right&quot;,&quot;id&quot;:&quot;38037&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1 b\u00e0i vi\u1ebft&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;IGCSE Waves Questions 2026: How to Answer Common Exam Problems More Clearly and Accurately&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>IGCSE\u00a0waves questions\u00a0test whether you can apply core wave ideas\u2014not just recall definitions\u2014under exam conditions. They focus on amplitude and wavelength, using the wave equation v=f\u03bbv=f\u03bb (and f=1\/Tf=1\/T), and explaining transverse vs longitudinal waves with correct diagrams, including wavefronts, compression, and rarefaction. High-frequency topics include reflection, refraction (frequency constant; speed and wavelength change), diffraction, and the &#8230; <a title=\"IGCSE Waves Questions 2026: How to Answer Common Exam Problems More Clearly and Accurately\" class=\"read-more\" href=\"https:\/\/times.edu.vn\/en\/igcse\/igcse-waves-questions\/\" aria-label=\"Read more about IGCSE Waves Questions 2026: How to Answer Common Exam Problems More Clearly and Accurately\">Read more<\/a><\/p>\n","protected":false},"author":7,"featured_media":38041,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","rank_math_title":"","rank_math_description":"","footnotes":""},"categories":[166],"tags":[],"class_list":["post-38037","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-igcse"],"_links":{"self":[{"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/posts\/38037","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/comments?post=38037"}],"version-history":[{"count":3,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/posts\/38037\/revisions"}],"predecessor-version":[{"id":38078,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/posts\/38037\/revisions\/38078"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/media\/38041"}],"wp:attachment":[{"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/media?parent=38037"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/categories?post=38037"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/times.edu.vn\/en\/wp-json\/wp\/v2\/tags?post=38037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}