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प्रश्न
Why does an unpolarised light incident on a polaroid get linearly polarised ?
How does one get linearly polarised light with the help of a polaroid?
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उत्तर १
When unpolarised light is passed through a polaroid crystal, only those vibrations of light pass through the crystal that are parallel to the axis of the crystal. All other vibrations will be absorbed by the crystal. In this way, the unpolarised light incident on a polaroid gets linearly polarised.
उत्तर २
We get linearly polarised light with the help of a polaroid as shown below:
The naked eye or the polariser cannot distinguish between unpolarised and plane polarised light. A crystal called analyser is used to analyse the nature of light.
If the axis of the polariser and the analyser are parallel to each other, the intensity of light is found to remain unaffected.
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संबंधित प्रश्न
With the help of neat diagram, explain how non-polar dielectric material is polarised in external electric field of increasing intensity. Define polarisation in dielectrics.
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What is the value of refractive index of a medium of polarising angle 60°?
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State any two methods by which ordinary light can be polarised
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The transverse nature of light is shown in ______.
What is partially polarised light?
