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Chapter 15: Problem 2137

Which of the following rays are not electromagnetic waves? (A) \(\alpha\) rays (B) \(\gamma\) rays (C) \(\beta\) rays (D) heat rays

Short Answer

Expert verified
The correct answer is (A) \(\alpha\) rays and (C) \(\beta\) rays, as they are not electromagnetic waves but a type of ionizing particle radiation.

Step by step solution

01

Identify Electromagnetic Waves

We need to identify which options are not electromagnetic waves. Let's analyze each option: (A) α rays - These are helium nuclei, made up of 2 protons and 2 neutrons. They are not electromagnetic waves but a type of ionizing particle radiation. (B) γ rays - These are high-energy photons. They are electromagnetic waves. (C) β rays - These are high-speed electrons or positrons. They are not electromagnetic waves but a type of ionizing particle radiation. (D) heat rays - These are generally classified as infrared radiation and are a type of electromagnetic wave.
02

Choose the Correct Answer

From the above analysis, we can now see that options (A) α rays and (C) β rays are not electromagnetic waves. So the correct answer is (A) \(\alpha\) rays and (C) \(\beta\) rays.

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Most popular questions from this chapter

In a plane electromagnetic wave, the electric field oscillates sinusoidaly at a frequency of \(2.0 \times 10^{10} \mathrm{~Hz}\). if the peak value of electric field is \(60 \mathrm{Vm}^{-1}\) the average energy density (in \(\mathrm{Jm}^{-3}\) ) of the magnetic field of the wave will be (given \(\left.\mu_{0}=4 \pi \times 10^{-7} \mathrm{Tm} / \mathrm{A}\right)\) (A) \(2 \pi \times 10^{-7}\) (B) \((1 / 2 \pi) \times 10^{-7}\) (C) \(4 \pi \times 10^{-7}\) (D) \((1 / 4 \pi) \times 10^{-7}\)

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An electromagnetic wave going through vacuum is described by $E=E_{0} \sin (k x-\omega t)\( then \)B=B_{0} \sin (k x-\omega t)$ then (A) \(E_{0} B_{0}=\operatorname{cok}\) (B) \(E_{0} k=B_{0} \omega\) (C) \(\mathrm{E}_{0} \mathrm{~m}=\mathrm{B}_{0} \mathrm{k}\) (D) none of these

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