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Condition for Observable Pattern

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Question

state the reason why 2 independent sources of light cann't be used as coherent sources?

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Solution

Dear Student!!
Coherent source of light are those source of light which emit light wave of same wavelength, same frequency and in same phase or having the constant phase difference.
Two independent sources can never have all these factors same at a time. Hence, two independent sources of light can 't be used as a coherent sources

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