Question

The wavelength of X-rays is of the order of

• A. $1meter$
• B. $1cm$
• C. $1micron$
• D. $1Angstrom$

Answer 1

The correct option is D

$1Angstrom$

Explanation for the correct option:

1. X-rays are powerful electromagnetic rays.
2. They have shorter wavelength of the range of ${10}^{-8}m$ to ${10}^{-12}m$.
3. They have higher frequency ranging from ${10}^{16}$to ${10}^{20}Hz$.
4. They can travel in vacuum.
5. Their typical uses for example are in the field of medical science, astronomy, in identifying the defects in welds in industries, and etc.
6. Thus, the wavelength of X-rays is of the order of $1Angstrom$.
7. We know that, $1Angstrom={10}^{-10}m$.

Hence, option (D) is the correct answer.