Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:

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 : 

Options:

1.24 x 10 nm

1.24 x 10-3 nm

1.24 nm

1.24 x 10-6 nm

Correct Answer:

1.24 x 10-3 nm

Explanation:

Use : E = \(\frac{h c}{\lambda}\)

E = 1 MeV

$ \Rightarrow \lambda = \frac{hc}{E} = \frac{1240}{10^6}nm = 1.24 \times 10^{-3} nm$