Recall Planck S Constant Equals 6 63 A 10 34 J S And The Speed Of Light Is 3 00

Recall Planck’s constant equals 6.63 a 10^-34 j.s and the speed of light is 3.00 x 10^8 m/s. Calculate the wavelength in nm of a photon emitted by a hydrogen atome when its electron drops from the n=4 state to the n=3 state.

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