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प्रश्न
What is partially polarised light?
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उत्तर
If the intensity of light varies between maximum and minimum for every’ rotation of 90° of the analyser, the light is said to be partially polarised light.
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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.
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.
If the critical angle of a medium is sin-1(3/5), find the polarising angle.
Three identical polaroid sheets P1, P2 and P3 are oriented so that the pass axis of P2 and P3 are inclined at angles of 60° and 90° respectively with the pass axis of P1. A monochromatic source S of unpolarised light of intensity I0 is kept in front of the polaroid sheet P1 as shown in the figure. Determine the intensities of light as observed by the observer at O, when polaroid P3 is rotated with respect to P2 at angles θ = 30° and 60°.
What dose a polaroid consist of?
What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5)
Show using a proper diagram how unpolarised light can be linearly polarised by reflection from a transparent glass surface.
State any two methods by which ordinary light can be polarised
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 the difference between polarised light and unpolarised light?
The transverse nature of light is shown in ______.
Discuss polarisation by selective absorption.
What is unpolarised light?
State and obtain Malus’ law.
What is double refraction?
Mention the types of optically active crystals with example.
Can reflection result in plane polarised light if the light is incident on the interface from the side with higher refractive index?
To ensure almost 100 per cent transmissivity, photographic lenses are often coated with a thin layer of dielectric material. The refractive index of this material is intermediated between that of air and glass (which makes the optical element of the lens). A typically used dielectric film is MgF2 (n = 1.38). What should the thickness of the film be so that at the center of the visible spectrum (5500 Å) there is maximum transmission.
