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Edexcel IGCSE Topic 3 - Waves




Below is everything the examiners think you know, if you're not sure of something click on the link to watch my YouTube video explanation. For a copy of these you can print off, get the FREE revision guide I wrote for you.


 • I can use and recall the equations and the units for this unit as shown in the equation sheet

 • I can compare and contrast transverse waves and longitudinal waves

 • I can define amplitude, wavefront, frequency, wavelength and period of a wave

 • I can recall that waves transfer information and energy without moving matter

 • I can recall and use the equation linking the speed, frequency and wavelength of a wave

 • I can use the equation linking frequency and time period

 • I can use the wave equations for both sound and electromagnetic waves

 • I can define and explain the Doppler effect

 • I can describe and explain reflection and refraction in waves

 • I can recall the order of the electromagnetic waves

 • I can state that all electromagnetic (EM) waves travel at the same speed in free space

 • I can describe the waves of the EM spectrum fully

 • I can explain some uses of the waves in the EM spectrum

 • I can explain the dangers of the waves in the EM spectrum

 • I can recall that light waves are transverse waves

 • I can describe the reflection and refraction of light waves

 • I can use the law of reflection

 • I can draw and label ray diagrams to show reflection and refraction

 • I can describe a practical investigation into the refraction of light, using rectangular blocks, semi-circular blocks and triangular prisms

 • I can recall and use the equation linking refractive index, angle of incidence and angle of refraction

 • I can describe a practical investigating the refractive index of glass, using a glass block

 • I can describe total internal reflection and how it is used

 • I can define ‘critical angle’

 • I can use the equation linking critical angle and refractive index

 • I can describe sound waves as longitudinal waves

 • I can recall the frequency range for human hearing

 • I can describe a practical investigation into the speed of sound in air

 • I can describe how an oscilloscope displays sound waves

 • I can describe a practical investigation of the frequency of a sound wave using an oscilloscope

 • I can explain how pitch of a sound is related to frequency of a wave

 • I can explain how loudness of a sound is related to amplitude of a wave