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Question: light is incident on a diffraction grating with 8300 linescm...

Question details

Light is incident on a diffraction grating with 8300 lines/cm , and the pattern is viewed on a screen 2.5 m from the grating. The incident light beam consists of two wavelengths, 4.8×10−7 m and 6.8×10−7 m .

Calculate the linear distance between the first-order bright fringes of these two wavelengths on the screen.

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