Which of the following rays are not electromagnetic waves? (a) X-rays (b) γ -rays (c) β -rays (d) heat rays

Answer: (c). X-rays, gamma rays and heat (infrared) rays are EM waves. β -rays are a stream of fast electrons, which are charged particles, not EM waves. So the answer is (c) β -rays.

Which of the following rays are not electromagnetic waves? | NEET 2003 (AIPMT)

Q35NEET 2003 · AIPMTEasy

Electromagnetic Spectrum & Atmosphere

Which of the following rays are not electromagnetic waves?

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Answer: (c)

X-rays, gamma rays and heat (infrared) rays are EM waves.
$\beta$ -rays are a stream of fast electrons, which are charged particles, not EM waves.
So the answer is (c) $\beta$ -rays.

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