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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 1MeV energy is nearly

A

1.2 nm

B

`1.2xx10^(-3)nm`

C

`1.2xx10^(-6)nm`

D

`1.2xx10^(1)nm`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) : Here, `E=1MeV=10^(6)eV,h=6.63xx10^(-34)Js`,
`c=3xx10^(8)"m s"^(-1)`
`:.hc=(6.63xx10^(-34)xx3xx10^(8))/(1.6xx10^(-19))~~1240eVnm`
As `E=(hc)/(lamda)orlamda=(hc)/(E)=(1240eVnm)/(10^(6)eV)=1.24xx10^(-3)nm`
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