Physics-Helium-neon laser is usually constructed
Physics-Helium-neon laser is usually constructed
Subject: Physics   / General Physics
Question
Helium-neon laser is usually constructed to operate in the red light which has the wavelength of 632.8 nm.
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1) Calculate the expected frequency of this red laser light in Gigahertz?
2) What is the energy of a single photon generated from this laser (in eV)?
Note: 1 eV = 1.602×10-19 J.
