He-ne lasers are often used in physics demonstrations they, Ask an Expert

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He-Ne lasers are often used in physics demonstrations. They produce light of wavelength 633 nm and a power of 0.500 mW spread over a cylindrical beam 1.30 mm in diameter (although these quantities can vary).

a) What is the intensity of this laser beam? (answer in W/m2)

b) What is the maximum value of the electric field? (answer V/m)

c) What is the maximum value of the magnetic field? (answer in mT)

d) What is the average energy density in the laser beam? (answer in J/m3)

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