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Question

Which of the following facts suggests that light is a non-mechanical wave?

A
Lights reflects
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B
Light bends when moving from one medium to another
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C
Light is required for photosynthesis
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D
Light reaches the earth's surface from sun
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Solution

The correct option is D Light reaches the earth's surface from sun
There is vacuum between sun and earth yet the sun light reaches earth.It implies that it can move without medium and so it is a non-mechanical wave.

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