State any two conditions for steady interference pattern - Vidyadip

Question

State any two conditions for steady interference pattern

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Answer

The two sources of light must be coherent, i.e., there is a constant phase difference between the light waves emitted by the two sources. (This condition is met only if the two sources are derived from the same source.)
The two sources of light must be monochromatic, i.e., the light emitted is of the same wavelength.

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