a helium-neon laser emits light with a wavelength 633 nm. Calculate its energy
Given that:
Wavelength of the light, λ = 633 nm = 633 x 10-9 m
Planck's constant, h = 6.626 x 10-34 J.s
Speed of light, C = 3 x 108 m/s
Therefore, Energy of the light is given by:
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