A laser beam of wavelength 630 nm coherence width 8x10 -3 M and power 10Mw shines on a surface 100 M away. Seduce the illumination. Compare it with that due to a collamated beam from a torch filament of diameter 0.1 cm , lence of focal length 10 cm and power 10 W.
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
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