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

The answer is (b) very near to the focus of the reflector

• Headlight reflectors and search lights are in the shape of concave mirror.
• When source of light is placed at the focus, reflected light appears like a beam