The wavelength of a photon needed to remove a \( \mathrm{P} \) prot...

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The wavelength of a photon needed to remove a
\( \mathrm{P} \)
proton from a nucleus which is bound to the nucleus
W
with \( 1 \mathrm{MeV} \) energy is nearly
(1) \( 1.2 \mathrm{~nm} \)
(2) \( 1.2 \times 10^{-6} \mathrm{~nm} \)
(3) \( 1.2 \times 10^{-3} \mathrm{~nm} \)
(4) \( 1.2 \times 10 \mathrm{~nm} \)
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