A beam of light of wavelength 600 nm passes through a slit of width 0.01 mm and

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A beam of light of wavelength 600 nm passes through a slit of width 0.01 mm and strikes a screen, normal to the beam, placed a distance 2m from the slit. Derive an expression for the shape of the intensity distribution seen on the screen and thereby deduce the width between the first minima of the distribution. Suppose the screen were to be coated with phosphor and a beam of electrons were to be used instead of light. Through what potential difference should the electrons be accelerated before they reach the slit if the spreading of the beam is to be reduced by f actor of 103 below that found for light?


Distribution
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