Fig. 5.1 depicts a ray of yellow light incident on a glass prism ABC. The diagram shows a triangular prism with base AC and apex at B, with a ray labelled "yellow light" entering face AB and moving through the prism.
(a)[1]
Explain why the ray keeps the same direction as it enters the prism at face AB.
(b(i))[2]
Calculate the refractive index of the glass, showing your working.
(b(ii))[3]
On Fig. 5.1, extend the light path through the prism and beyond the point where it leaves the prism.
(c)[2]
State two benefits of using optical fibres to transmit data.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The ray travels along the normal OR the angle of incidence = 0^{\circ}” …