Question

In torches, search lights and headlights of vehicles the bulb is placed

(a) between the pole and the focus of the reflector

(b) very near to the focus of the reflector

(c) between the focus and centre of curvature of the reflector

(d) at the centre of curvature of the reflector

Answer 1

In torches, search lights, headlights, the bulb is placed very near to the focus of the reflector resulting in a parallel beam of light through which you can see for a longer distance. So the answer is (b).