Tag: polarisation

Questions Related to polarisation

A nicol prism is based on action of

polarisation of light polarisation wave optics optics physics

  1. refraction

  2. double refraction

  3. dichroism

  4. both (b) and (c)

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Correct Option: D
Explanation:

When a ray of light enters nicol prism, it splits into two plane polarised light in mutually perpendicular direction. One of this light undergoes total reflection and absorption whereas other comes out as a plane polarised light.

If a polaroid is kept in the path of an uniformly unpolarised light, the intensity of the transmitted light to the intensity of the light when the polaroid was not kept in its path is.

polarisation of light polarisation wave optics optics physics

  1. 1

  2. $\dfrac{1}{2}$

  3. $\dfrac{1}{\sqrt 2}$

  4. $\dfrac{1}{2\sqrt 2}$

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Correct Option: B
Explanation:
The component of the electric vector of all the electric vectors of unpolarised light in one direction only = $\dfrac {E _0}{\sqrt {2}} $
And, $I \propto E^2 \Rightarrow I = \dfrac {I _0}2 $

A Nicol prism can be used.

polarisation of light polarisation wave optics optics physics

  1. For producing and analysing polarised light

  2. Only to analyse polarized light

  3. Only to produce polarized light

  4. None of the above

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Correct Option: A
Explanation:

A Nicol prism is use to produce and analyse the polarised light.

What is used to measure doppler line broadening.

polarisation of light polarisation wave optics optics physics

  1. Polaroid

  2. Diffration grating

  3. Herapathite

  4. Plasma

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Correct Option: D

The angle of incidence at which reflected light is totally polarized form aim is :

polarisation of light polarisation wave optics optics physics

  1. $\sin ^ { - 1 } ( n )$

  2. $\sin ^ { - 1 } \left( \frac { 1 } { n } \right)$

  3. $\tan ^ { - 1 } \left( \frac { 1 } { n } \right)$

  4. $\tan ^ { - 1 } ( n )$

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Correct Option: D