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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. Waves from two sources superpose on each other at a particular point, amplitude and frequency of both the waves are equal. The ratio of intensities when both waves reach in the same phase and when they reach with the phase difference of

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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.

Q. Statement-1: All points on a wavefront vibrate in same phase with same frequency
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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