When the electron in a hydrogen atom falls from its first excited energy level to the ground state energy level, a photon with wavelength $\lambda$ is emitted. A proton having this same wavelength would have a velocity of A)3.87 m/s B)5990 m/s C)1.21 * 10^-7 m/s D)3.26 m/s E)5.99 m/s

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The Answer of When the electron in a hydrogen atom falls from its first excited energy level to the ground state energy level, a photon with wavelength $\lambda$ is emitted. A proton having this same wavelength would have a velocity of A)3.87 m/s B)5990 m/s C)1.21 * 10^-7 m/s D)3.26 m/s E)5.99 m/s

When the Electron in a Hydrogen Atom Falls from Its λ\lambdaλ

When the Electron in a Hydrogen Atom Falls from Its $\lambda$