A filter is used to obtain approximately monochromatic light from a white source. If the pass band of the filter is 10 nm, Defining the coherence length and time, find the coherence length and coherence time of the filtered light? The mean wavelength is 600 nm.

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.