Question

Which of the following ray are not electromagnetic waves

• A. X-rays
• B. $\gamma$-rays
• C. $\beta$-rays
• D. Heat rays

Answer 1

Answer: (C)

$\beta$-rays

Answer 2

Cosmic rays, $\gamma$-rays, and $X$-rays are part of electromagnetic spectrum, while $\beta$-rays are emitted by radioactive elements. Hence $\beta$-rays is not electromagnetic waves.