Question

The thermal radiations are similar to :

• A. x-rays
• B. cathode rays
• C. $\alpha$- rays
• D. $\gamma$- rays

Answer 1

The correct option is A x-rays

Among the above four options: X-ray can only act as heat rays. $\alpha$-rays are nuclear emissions, cathode rays are simply rays made up of electrons. $\gamma$-rays are simply photon rays, $\gamma$-rays have very high penetrating power so it cannot act as heat ray, So X-ray is the appropriate answer.