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A laser has m and aperture 10–3 m sends a beam to Moon which is at a distance of 4 ×108 m from the earth. Deduce the angular spread of the beam
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Correct option is B
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In Young's double slit experiment, carried out with light of wavelength A = 5000 tif the distance between the third minima on the either side of the central maxima is 25mm and the screen is at 200 cm from the slits. then the distance between the slits is
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