In torches, search-lights and head-lights of vehicles, the bulb is placed ……………… 

Monjur Alahi

In torches, search-lights and head-lights of vehicles, the bulb is placed ……………… 

A) between the pole and the focus of the reflector. 

B) at the focus of the reflector. 

C) at the centre of curvature of the reflector. 

D) between the focus and the centre of curvature of the reflector.


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Salim Ahmed Kawsar

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B) at the focus of the reflector.

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