Identify the device which work on the reflection of light:

megaphone

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stethoscope

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sound boards

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Solution

The correct option is C sound boards
Sound board is device which works on the reflection of light while others works on the reflection of sound.

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Similar questions

Name a device which works on the reflection of reflected light.

A device which works on the reflection of light from two plane mirrors arranged parallel to one another is:

(a) electroscope

(b) kaleidoscope

(d) stethoscope

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