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प्रश्न
How does one demonstrate, using a suitable diagram, that unpolarised light when passed through a Polaroid gets polarised?
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उत्तर
The phenomenon of restricting the vibration of light (electric vector) in a particular direction perpendicular to the direction of the wave propagation is called polarisation of light.
When unpolarised light is passed through a Polaroid, only those vibrations of light pass through the crystal, which are parallel to the axis of the crystal (AB). All other vibrations are absorbed and that is why intensity of the emerging light is reduced.
The plane ABCD in which the vibrations of the polarised light are confined is called the plane of vibration. The plane KLMN that is perpendicular to the plane of vibration is defined as the plane of polarisation
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संबंधित प्रश्न
Draw a neat labelled diagram showing the plane of vibration and plane of polarisation for polarised light.
For a glass plate as a polariser with refractive index 1.633, calculate the angle of incidence at which light is polarised.
What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5)
Unpolarised light is passed through a polaroid P1. When this polarised beam passes through another polaroid P2 and if the pass axis of P2 makes angle θ with the pass axis of P1, then write the expression for the polarised beam passing through P2. Draw a plot showing the variation of intensity when θ varies from 0 to 2π.
What does a polaroid consist of? How does it produce a linearly polarised light?
Which of the following properties shows that light is a transverse wave?
What is polarisation?
Discuss polarisation by selective absorption.
What is a analyser?
What is plane polarised light?
