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

Answer: (c). γ -rays and X-rays are high-energy photons, so they are EM waves. β -rays are fast electrons (charged particles), not EM waves. So the answer is (c) β -rays.

Which of the following are not electromagnetic waves? | JEE Main 2002 (AIEEE)

Q38JEE Main 2002 · AIEEEEasy

Electromagnetic Spectrum & Atmosphere

Which of the following are not electromagnetic waves?

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Answer: (c)

$\gamma$ -rays and X-rays are high-energy photons, so they are EM waves.
$\beta$ -rays are fast electrons (charged particles), not EM waves.
So the answer is (c) $\beta$ -rays.

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Electromagnetic Spectrum & Atmosphere question from JEE Main 2002 (AIEEE)

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