An intense monochromatic light incident on a diffraction grating with slit spacing d is causing an...

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An intense monochromatic light incident on a diffraction grating with slit spacing d is causing an...

An intense monochromatic light incident on a diffraction grating with slit spacing d is causing an increase of the grating temperature. How should the frequency of the light be changed so that the position of bright fringes does not change.

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