Answered: A laser beam has a power of 50mW.It has…

A laser beam has a power of 50mW.It has an aperture of 5times10^(-3)m and wavelength 7000A.The beam is focused with a lens of foal length of 0.2m.Calculate the area spread and intensity of the image.

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Question

A laser beam has a power of 50mW.It has an aperture of 5times10^(-3)m and wavelength 7000A.The beam is focused with a lens of foal length of 0.2m.Calculate the area spread and intensity of the image.

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