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Refraction through Glass Slab

A light paddl...

Question

A light paddle wheel placed in the path of _______ will rotate.

cathode rays

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α

-rays

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β

-rays

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all the above

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Solution

The correct option is D all the above
All the above
A light paddle will rotate when it is placed in the path of $α, β$ or cathod rays. Because these particles move with a velocity. When they strike the light paddle wheels blades the momentum is shared and it starts rotating.

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