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Question

Polarisation of light proves the


A

Corpuscular nature of light

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B

Longitudinal nature of light

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C

Quantum nature of light

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D

Transverse nature of light

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Solution

The correct option is D

Transverse nature of light


The explanation for the correct option:

In the case of option D,

  1. A vibrating electric field and a vibrating magnetic field are both present in light. In an electric field, the plane of vibrations is perpendicular to the propagation path of the light wave. Light is thus a transverse wave.
  2. The wave nature of light is explained by polarisation. It is impossible to polarise longitudinal waves. Transverse waves can only be polarised in this way.
  3. As a result, polarisation of light demonstrates the transverse nature of light.

The explanation for the incorrect options:

In the case of option A,

  1. Light is made up of small discrete particles known as "corpuscles" (small particles) that travel in a straight path with a defined velocity and have the impetus.

In the case of option B,

  1. Light is a transverse wave, while sound is a longitudinal wave.
  2. Only light can achieve polarisation because the wave's direction must be perpendicular to the direction of propagation.

In the case of option C,

  1. Light travels in bundles of energy, each of which is referred to as a photon.
  2. The product of the photon's frequency of vibration and Planck's constant is the amount of energy carried by each photon.

Hence option (D) is the correct answer.


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