Multiple choice

Of the following radiations, all are dangerous except

  1. cosmic rays

  2. short-radio waves

  3. ultra-violet rays

  4. X-rays
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cosmic rays, UV rays, and X-rays are forms of ionizing or high-energy radiation that can damage biological tissues. Short-radio waves have much lower frequencies and energies, making them non-ionizing and generally safe for humans.

Keep practicing — related questions