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In torches, search lights and headlights...

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.

Text Solution

Verified by Experts

The correct Answer is:
B

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.
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