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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