(a)[1]
State how a longitudinal wave is different from a transverse wave.
(b(i))[2]
Calculate the wave’s frequency.
(b(ii))[1]
State what happens to the wave’s frequency as it moves into the right-hand section of the tank.
(b(iii))[2]
Using Fig. 9.1, state and explain how the wave’s speed changes as it enters the right-hand section of the tank.
(c(i))[1]
Underline the words that describe a light wave: electromagnetic, longitudinal, transverse.
(c(ii))[2]
Calculate the angle $r$.
(c(iii)1)[2]
Calculate the critical angle $c$ for light moving through the block.
(c(iii)2)[2]
State and explain what happens to the light as it hits side XY.
(c(iii)3)[2]
On Fig. 9.2, draw the light’s path after it hits side XY at P, and also show the path of the light once it is travelling in the air again.