A source emits visible light.
Fig. 6.2 shows a ray of red light from the source incident on the face XY of a glass prism at point S.
The angle of incidence i of the ray is 35 °. The refractive index of the glass for red light is 1.5.
(i)
Calculate the angle of refraction in the glass at S.
angle of refraction = ......................................................... [2]
(ii)
On Fig. 6.2, draw the refracted ray at face XY and the ray emerging from face XZ of the
prism. Label this ray R.
[2]
(iii)
A ray of blue light follows the same path as the ray of red light incident on the face XY.
On Fig. 6.2, draw the path of this ray in the prism and emerging from the prism.
Label this ray B.
[2]