A 15mw energy laser has a beam exit diameter of 2cm and, Ask an Expert

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A 15mw energy laser has a beam exit diameter of 2cm and beam divergence of 0.0002radians.

a) Calculate the power density of the beam at 100meters away from the source.

b) Assuming that this beam has a wave length of 312nm, and the viewing time is 10minutes/day, determine if the TLV is exceeded.

After 7 hours of its preparation determine the portion left of a radioactive isotope, if its half-life is known to be 5 hours.

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Category:- Physics
Reference No.:- M9784134

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