Question

A laser beam can be focused on an area equal to the square of the
wavelength. For a He Ne laser 1= 6328 Å. If the laser radiates
energy at the rate of 2 mW, what will be intensity of the laser
beam?
Select one:
W
O 1.5 x 10^9 W/m2
O 2.2.5 x 10^9 W/cm2
O 3.2.5 x 10^9 W/m2
O 4.5 x 10^9 W/cm2

Answer 1

Explanation:

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