Question

Some radioactive nucleus may emit.

• A. Only one $- 13.6\mspace{6mu} eV$ or $\gamma$at a time
• B. All the three $92U^{238}$ and $\gamma$ one after another
• C. All the three $\alpha,\mspace{6mu}\beta$ and $\gamma$ simultaneously
• D. Only$\alpha$ and $\beta$ simultaneously

Answer 1

Answer: (A)

Only one $- 13.6\mspace{6mu} eV$ or $\gamma$at a time

Answer 2

No radioactive substance emit both $\alpha$and $\beta$particles simultaneously. Some substances emit $\alpha -$particles and some other emits $\beta -$particles. $\gamma -$rays are emitted along with both $\alpha$and$\frac{4E}{3} - E = \frac{hc}{\lambda'} \Rightarrow \frac{E}{3} = \frac{hc}{\lambda'}\mspace{6mu}\mspace{6mu}\therefore\frac{\lambda'}{\lambda} = 3 \Rightarrow \lambda' = 3\lambda$particles.