The final image formed by a refracting periscope is ____ than the reflecting periscope.

Bright

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sharp

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Dimmer

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Both (A) and (B)

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Solution

The correct option is D Both (A) and (B)
Refracting periscope is far better in terms of image quality then reflecting periscope.Hence image formed by refracting periscope is brighter and sharper.
The reason is refracting periscope use prism which shows total internal reflection (TIR) and TIR shows no loss of light. While reflecting periscope is based on simple reflection where some light energy is lost.

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