Question

Electromagnetic radiation of highest frequency is

• A. infrared radiations
• B. $\gamma$ -rays
• C. radio waves
• D. X-rays

Answer 1

Answer: (B)

Electromagnetic radiations in the order of increasing frequencies is given by $v_{\text{radio }}<v_{\text{micro }}<v_{\text{infrared }}<v_{\text{visible }}<v_{\text{ultraviolet }}<v_{X\text{ -rays }}<v_{\gamma -\text{ rays }}$
Therefore, $\gamma$ -rays have the highest frequency.