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  • What I want to ask is monochromatic light necessary for interference?

  • Doesn't interference occur on just the superposition of two waves(any waves)?

  • And Why don't waves of different wavelengths don't interfere in a diffraction grating with other waves but only with waves of the same wavelength(again as interference is just superposition of two waves)?

  • Why do we say that the waves interfere seperately?

Iamat8
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Batwayne
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1 Answers1

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Actually what's necessary for interference is a constant phase difference and nothing else.

When we have a constant phase difference the super position of the waves gives us the interference pattern but when the phase difference is not constant the superposition just averages out to give a uniform intensity.

The same frequency constraint is a consequence of the constant phase difference constraint.

Pranav Rastogi
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