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Nature of Electromagnetic Radiation

Two sources o...

Question

Two sources of light are said to be coherent when both give out light waves of same:

A

phase and speed

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B

intensity and wavelength

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C

amplitude and phase

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D

wave length and constant phase difference

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Solution

The correct option is D
wave length and constant phase difference

Two sources of light are said to be coherent when both give out light waves of same wave length and constant phase difference.

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Q. Assertion :For two source to be coherent phase difference between two waves at all points should be same. Reason: Two different light source are never coherent.

Q. Assertion :Only coherent light sources produce sustained interference. Reason: Coherent light sources emit lights of same wavelength and with a constant phase difference.

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Statement-2: Two sources are said to be coherent if they produce waves of same frequency with a constant phase difference.

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