Question: A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of = 1 0 4 . 1 n m . Part A

A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of

= 104.1 n m .

Part A

What is the atom's final speed if it now emits an identical photon in a direction that is perpendicular to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units.

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Part B

What is the atom's final speed if it now emits an identical photon in a direction that is opposite to the direction of motion of the original photon?

Express your answer to three significant figures and include appropriate units.

A hydrogen atom, initially at rest, absorbs an

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