#3.14
know that light waves are transverse waves and that they can be reflected and refracted
#3.15
use the law of reflection (the angle of incidence equals the angle of reflection)
#3.16
draw ray diagrams to illustrate reflection and refraction
#3.17
practical: investigate the refraction of light, using rectangular blocks, semi-circular blocks and triangular prisms
#3.18
know and use the relationship between refractive index, angle of incidence and angle of refraction:
\(n = \dfrac{\sin{i}}{\sin{r}}\)
#3.19
practical: investigate the refractive index of glass, using a glass block
#3.20
describe the role of total internal reflection in transmitting information along optical fibres and in prisms
#3.21
explain the meaning of critical angle c
#3.22
know and use the relationship between critical angle and refractive index:
\(\sin{c} = \dfrac{1}{n}\)
#3.23
know that sound waves are longitudinal waves which can be reflected and refracted
#3.24P
know that the frequency range for human hearing is 20–20000Hz
#3.25P
practical: investigate the speed of sound in air
#3.26P
understand how an oscilloscope and microphone can be used to display a sound wave
#3.27P
practical: investigate the frequency of a sound wave using an oscilloscope
#3.28P
understand how the pitch of a sound relates to the frequency of vibration of the source
#3.29P
understand how the loudness of a sound relates to the amplitude of vibration of the source