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  4. Electromagnetic radiation MCQ - Practice Questions with Answers

Electromagnetic radiation MCQ - Practice Questions with Answers

Updated on Sep 25, 2023 25:23 PM

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  • 8 Questions around this concept.

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Ratio of frequency of two radiations having wavelength 4000 and 6000 Ao respectively

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Speed of electromagnetic radiation and EM radiation

EM radiation -

According to electromagnetic wave theory, energy is emitted continuously from a source in the form of radiations (or waves), known as electromagnetic radiation.

The relation between frequency, wavelength, and wavenumber:

Frequency ∝ 1/wavelength            wavenumber ∝ 1/wavelength

Radio wave -\mathrm{3\times 10^{14}\ to\ 3 \times 10^{7} A^o} 

Microwave - \mathrm{3\times 10^{9}\ to\ 3 \times 10^{6} A^o}

Infrared - \mathrm{6\times 6^{6}\ to\ 7600 \ A^o}

Ultraviolet - \mathrm{3800\ to\ 150\ A^o}

X-rays - \mathrm{150\ to\ 0.1\ A^o}

Gamma rays - \mathrm{0.1\ to\ 0.01 \ A^o}

 

Speed of electromagnetic radiation - 

c= \nu \lambda

where the frequency is (\nu, pronounced as nu), the wavelength is (λ) and velocity of light is (c)

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Speed of electromagnetic radiation and EM radiation

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Speed of electromagnetic radiation and EM radiation

Chemistry Part I Textbook for Class XI

Page No. : 37

Line : 20

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