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It wasn’t 1.003 x 10^6 or 1003000 please help!

If an electron makes a transition from the
n = 5 Bohr orbit to the n = 2 orbit, determine
the wavelength of the photon created in the
process.
Answer in units of m.
Assuming that the atom was initially at rest,
determine the recoil speed of the hydrogen
atom when this photon is emitted.
Answer in units of m/s.

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