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

question 45

Multiple Choice

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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