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The wavelength of a photon needed to rem...

The wavelength of a photon needed to remove a proton from a nucleus. which is bound to the nucleus with 1 MeV energy is nearly

A

`1.2 nm`

B

`1.2 xx 10^-3 nm`

C

`1.2 xx 10^-6 nm`

D

`1.2 xx 10^1 nm`

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