Question

Consider the following statements about electromagnetic waves and choose the correct ones.
$S_1$ : $EM$ waves having wavelengths $1000$ times smaller than light waves are called $X$-rays.
$S_2$ : Ultraviolet waves are used in the treatment of swollen joints.
$S_3$ : Alpha and gamma rays are not electromagnetic waves.
$S_4$ : de-Broglie waves are not electromagnetic in nature.
$S_5$ : Electromagnetic waves exhibit polarization while sound waves do not.

• A. $S_1, S_4$ and $S_5$
• B. $S_3, S_4$ and $S_5$
• C. $S_1, S_3$ and $S_5$
• D. $S_2, S_3$ and $S_4$

Answer 1

Answer: (A)

EM waves having wavelength $1000$ times smaller than light waves are called $X$-rays.
Ultraviolet waves are used in presence food, sterilizing the surgical instrument, detecting the invisible writings, finger prints etc.
(iii) Alpha and gamma rays are electromagnetic waves.
(iv) de-Broglie waves are not electromagnetic in nature.
(v) Electromagnetic waves exhibit polarization while sound waves do not.