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Statement of a problem № 4024

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In Fraunhofer diffraction due to a narrow slit a screen is placed 2 m away from the lens to obtain the pattern. If the slit width is 0.2 mm and the first minima are 5 mm on either side of the central maximum, find the wavelength of light.

Solution:
In Fraunhofer diffraction due to a narrow slit a screen is placed 2 m away from

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