MCQ
If ${\lambda _1}$ and ${\lambda _2}$ are the wavelengths of characteristic $X-$ rays and gamma rays respectively, then the relation between them is
- A${\lambda _1} = \frac{1}{{{\lambda _2}}}$
- B${\lambda _1} = {\lambda _2}$
- ✓${\lambda _1} > {\lambda _2}$
- D${\lambda _1} < {\lambda _2}$
