The diagram below shows white light incident at P on a glass prism. Only the refracted red ray PQ is shown in the prism.

a. Copy the diagram and draw rays to complete the path of the red ray and the whole path of the violet ray up to the point where they hit the screen. Label the violet ray.

a. Copy the diagram and draw rays to complete the path of the red ray and the whole path of the violet ray up to the point where they hit the screen. Label the violet ray.

b. The angle of incidence of the white light is increased to 40°. The refractive index of the glass for the red light is 1.52. Calculate the angle of refraction at P for the red light.

c. State the approximate speed of

i. The white light incident at P,

ii. The red light after it leaves the prism at Q.

Transcribed Image Text:

P/red ray o white light screen