Fig. 6.1 shows a section of an optical fibre used for high-speed broadband communication. The labels on Fig. 6.1 are: ray of light, optical fibre.
(a)[2]
State two advantages of optical fibres for high-speed data transmission compared with electrical signals sent through copper wires.
(b(i))[3]
Calculate the critical angle c.
(b(ii))[1]
State the meaning of critical angle.
(b(iii))[2]
On Fig. 6.1, mark the angle of incidence of the ray of light as it strikes the wall of the glass fibre. Then draw the ray’s path onward until it leaves the glass fibre.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “high data-transmission rates / data transmission that is faster” …