Question

Consider ${\lambda }_1$ and ${\lambda }_2$ are minimum wavelengths of continous and characteristic X-rays then

• A. ${\lambda }_1={\lambda }_2$
• B. ${\lambda }_1>{\lambda }_2$
• C. ${\lambda }_1<{\lambda }_2$
• D. None of these

Answer 1

The correct option is C ${\lambda }_1<{\lambda }_2$

Continuous x rays would possess larger energy than characteristic X rays.
$E\propto \frac{1}{\lambda }$
Hence, characteristic x rays would have a larger wavelength.
Hence ${\lambda }_2>{\lambda }_1$
So, the answer is option (C).