Question

If ${\lambda }_1$ and ${\lambda }_2$ are the wavelength of characteristic X-rays and gamma rays respectively, then the most appropriate relation between them is :

• A. ${\lambda }_1=\frac{1}{{\lambda }_2}$
• B. ${\lambda }_1={\lambda }_2$
• C. ${\lambda }_1>{\lambda }_2$
• D. ${\lambda }_1<{\lambda }_2$

Answer 1

Answer: (C)

${\lambda }_1>{\lambda }_2$

Order of wavelength from longest to shortest is-

Radio waves > microwaves > infrared > visible > ultraviolet > X-ray > gamma ray.

Thus X- ray has larger wavelength than gamma ray.

$⟹$ ${\lambda }_1>{\lambda }_2$