In which of the waves the energy is not propagated :

  1. em waves
  2. longitudional waves
  3. stationary waves
  4. transverse waves

Answer (Detailed Solution Below)

Option 3 : stationary waves
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The correct answer is option 3) i.e. stationary waves.

CONCEPT:

Electromagnetic (EM) waves
  • Electromagnetic waves are waves that are produced from vibrations due to an electric field and a magnetic field.
  • An EM wave is a transverse wave.
  • They do not require any medium to propagate.
Longitudinal waves
  • Longitudinal waves are those waves in which the particles of the medium move in a direction parallel to the direction of propagation of the wave.
  • The wave is active in nature i.e. it can move.
Stationary waves
  • A stationary wave is also called a standing wave.
  • This wave remains in a constant position and does not move.
  • Two waves that are opposite in nature can superimpose to form a standing wave.
Transverse waves
  • Transverse waves are those waves in which the particles of the medium move perpendicular to the direction of propagation of the wave.
  • The wave is active in nature i.e. it can move.

EXPLANATION:

  • A stationary wave is a standing wave and does not move.
  • Therefore, they cannot propagate any disturbance or energy through them.
  • The energy associated with these waves is contained within themselves.

Hence, stationary waves do not propagate energy.

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