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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 × 10–3 nm (c) 1.2 × 10–6 nm (d) 1.2 × 101 nm

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(b) 1.2 × 10–3 nm

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