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

Options

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

B

Explanation

The rays of light passing through the principal focus will ko parallel to principal Axis after reflection thus, forming a concentrated beam of light. so, due to this reason and torches, search rights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector.