For a ruby laser of wavelength 694 nm, the end of the ruby crystal is the aperture
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For a ruby laser of wavelength 694 nm, the end of the ruby crystal is the aperture that determines the diameter of the light beam emitted. If the diameter is 2 cm and the laser is aimed at the moon, 380,000 km away, find the approximate diameter of the light beam when it reaches the moon, assuming the spread is due solely to diffraction.
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Using Equation 3525 The di...View the full answer
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