Which type of wave is a light wave?

  1. Transverse wave
  2. Longitudinal wave
  3. Both
  4. None of the above

Answer (Detailed Solution Below)

Option 1 : Transverse wave
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Detailed Solution

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The correct answer is the Transverse wave.

  • Light is a Transverse wave.

Key Points

  • Light is a form of energy that is propagated as electromagnetic waves.
  • Electromagnetic waves are transverse, hence light is a transverse wave.
  • The wave nature of light explains rectilinear propagation, reflection, refraction, interference, diffraction, and polarization of light.
  • In quantum theory, light is regarded as a packet or bundle of energy called the photon.
  • Light behaves as wave and particle both. Thus light has dual nature.
  • Speed of light is maximum in vacuum and air (3 × 108 m/s).

  • Longitudinal Wave:
    • If the particles of the medium vibrate in the direction of propagation of the wave, the wave is called a longitudinal wave.
    • Waves on springs or sound waves in the air are examples of longitudinal waves.
  • Transverse Wave:
    • If the particles of the medium vibrate perpendicular to the direction of propagation of a wave, the wave is called a transverse wave.
    • Wave on strings under tension, waves on the surface of the water are examples of transverse waves.

F1 J.K Madhu 20.06.20 D3 (1)

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