Suppose we spread white light out into fan of wavelengths by means of a diffraction grating and
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Suppose we spread white light out into fan of wavelengths by means of a diffraction grating and then pass a small select region of that spectrum out through a slit. Because of the width of the slit, a band of wavelengths 1.2 nm wide centered on 500 nm emerges. Determine the frequency bandwidth and the coherence length of this light.
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