Question: He - Ne lasers are often used in physics demonstrations. They produce light of wavelength 6 3 3 nmnm and a power of 0 .

-

Ne lasers are often used in physics demonstrations. They produce light of wavelength

633

nmnm and a power of

0.450

mWmW spread over a cylindrical beam

1.20

mmmm in diameter

(

although these quantities can vary

) .

What is the intensity of this laser beam? What is the maximum value of the electric field? What is the maximum value of the magnetic field? What is the average energy density in the laser beam?

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