Which mirror is used as a torch reflector? Draw a labelled diagram to show how a torch reflector can be used to produce a parallel beam of light. Where is the bulb placed in relation to the torch reflector?

A concave mirror is used as a torch reflector.

The diagram is given below, showing how a torch reflector can be used to produce a parallel beam of light.

Light bulb is placed at the focus in relation to the torch reflector.

Explanation

When a light bulb is placed at the focus of a concave mirror reflector, then the diverging light rays of the bulb are collected by the concave reflector and then reflected to produce a strong, parallel-sided beam of light.

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Updated on: 10-Oct-2022

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