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Question
Which of the following are not electromagnetic waves?
Which of the following are not electromagnetic waves?
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Solution
The correct option is C Beta rays
The explanation of the correct option:
Electromagnetic Waves:
- An electromagnetic wave is a wave radiated by an oscillatory charge in which a varying magnetic field is the source of the electric field and a varying electric field is the source of the magnetic field.
- Both fields are perpendicular to each other.
- These fields are also perpendicular to the direction of propagation of the wave.
- Beta rays are emitted by radioactive elements and are not part of the electromagnetic spectrum.
The explanation for the incorrect options:
Gamma-ray, X-ray, and cosmic rays are part of the electromagnetic spectrum.
Therefore, option C is the correct choice.
Beta rays
The explanation of the correct option:
Electromagnetic Waves:
- An electromagnetic wave is a wave radiated by an oscillatory charge in which a varying magnetic field is the source of the electric field and a varying electric field is the source of the magnetic field.
- Both fields are perpendicular to each other.
- These fields are also perpendicular to the direction of propagation of the wave.
- Beta rays are emitted by radioactive elements and are not part of the electromagnetic spectrum.
The explanation for the incorrect options:
Gamma-ray, X-ray, and cosmic rays are part of the electromagnetic spectrum.
Therefore, option C is the correct choice.
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