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प्रश्न
State two uses of Polaroid.
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उत्तर
Uses of Polaroid:-
(1) In motor car head lights – To remove headlight glare
(2) To improve color contrast in old oil paintings
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संबंधित प्रश्न
If the polarising angle for a given medium is 60°, then the refractive index of the medium is.................
What is a Polaroid?
Draw a neat labelled diagram showing the plane of vibration and plane of polarisation for polarised light.
What dose a polaroid consist of?
Why does an unpolarised light incident on a polaroid get linearly polarised ?
Find an expression for intensity of transmitted light when a polaroid sheet is rotated between two crossed polaroids. In which position of the polaroid sheet will the transmitted intensity be maximum?
A beam of unpolarised light is incident on a glass-air interface. Show, using a suitable ray diagram, that light reflected from the interface is totally polarised, when μ = tan iB, where μ is the refractive index of glass with respect to air and iB is the Brewster's angle.
Using the phenomenon of polarisation, show how the transverse nature of light can be demonstrated.
What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5)
The refractive indices of water for red and violet colours are 1.325 and 1.334 respectively.
Find the difference between the velocities of rays for these two colours in water. (c = 3 × 108 m/s)
A ray of light passes from a vacuum to a medium of refractive index (μ). The angle of
incidence is found to be twice the angle of refraction. The angle of incidence is _______.
A) `cos^(-1)(mu/2)`
B) cos−1(μ)
C) `2 cos^(-1) (mu/2)`
D) `2 sin^(-1) (mu/2)`
State any two methods by which ordinary light can be polarised
Which of the following properties shows that light is a transverse wave?
Green light is incident at the polarising angle on a certain transparent medium. The angle of refraction is 30° . Find
(i) polarising angle, and
(ii) refractive index of the medium.
Explain how an unpolarised light gets polarised when incident on the interface separating the two transparent media.
Light transmitted by Nicol prism is ______.
What is polarisation?
What is plane polarised light?
What is unpolarised light?
State and obtain Malus’ law.
Mention the types of optically active crystals with example.
A plane mirror produces a magnification of
Polarisation of light is the only phenomenon that establishes ______.
Figure shown a two slit arrangement with a source which emits unpolarised light. P is a polariser with axis whose direction is not given. If I0 is the intensity of the principal maxima when no polariser is present, calculate in the present case, the intensity of the principal maxima as well as of the first minima.
An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from the analyzer is measured as 100 Lumens. Now, if the analyzer is rotated around the horizontal axis (direction of light) by 30° in clockwise direction, the intensity of emerging light will be ______ Lumens.
