What is the density of photons in the beam

Reference no: EM13521795

The wavelength of red light emitted by a 3.01-mW helium-neon laser is 626 nm. If the diameter of the laser beam is 1.11 mm, what is the density of photons in the beam? Assume that the intensity is uniformly distributed across the beam.

Reference no: EM13521795

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