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If the rays through the top and bottom of a slit reach a point on the viewing screen with a path length difference equal to 2 wavelengths, what is at that point?
a) first side maximum
b) third side maximum
c) first minimum
d) second minimum
e) third minimum
q1. a diffraction grating with exactly 1000 lines per centimeter is illuminated by a he-ne laser of wavelength 683
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Find out the potential difference between r2 and r1
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