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Electromagnetic radiation MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

Quick Facts

  • 8 Questions around this concept.

Solve by difficulty

QuestionDIFFICULT

Which of the following correctly lists electromagnetic radiation  in order from longest to shortest wavelength?

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Which characteristic of an electromagnetic radiation is affected by the medium through which it travels?

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Assertion: Electromagnetic waves interact with matter and set up oscillations.
Reason : Interaction is independent of the wavelength of the electromagnetic wave.

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Concepts Covered - 1

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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