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State Brewster’s law. - Physics

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प्रश्न

State Brewster’s law.

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उत्तर

The law states that the tangent of the polarising angle for a transparent medium is equal to its refractive index, tan i = n. This relation is known as Brewster’s law.

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अध्याय 7: Wave Optics - Evaluation [पृष्ठ १०३]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 7 Wave Optics
Evaluation | Q 32. | पृष्ठ १०३

संबंधित प्रश्न

What is a Polaroid?


What dose a polaroid consist of?


Show, with the help of a diagram, how unpolarised sunlight gets polarised due to scattering.


Two polaroids P1 and P2 are placed with their pass axes perpendicular to each other. An unpolarised light of intensity Io is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its pass axis makes an angle of 45° with that of P1. Determine the intensity of light transmitted through P1, P2 and P3


The refractive indices of glass and water w.r.t. air are 3/2 and 4/3 respectively. Determine the refractive index of glass w.r.t. water.


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)


State two uses of Polaroid.


Show using a proper diagram how unpolarised light can be linearly polarised by reflection from a transparent glass surface.


A beam of light is incident at the polarizing angle of 35° on a certain glass plate. The refractive index of the glass plate is : 


Explain how an unpolarised light gets polarised when incident on the interface separating the two transparent media.


Greenlight is an 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.


The transverse nature of light is shown in ______.


Discuss polarisation by selective absorption.


State and obtain Malus’ law.


List the uses of polaroids.


Polarisation of light is the only phenomenon that establishes ______.


Can reflection result in plane polarised light if the light is incident on the interface from the side with higher refractive index?


For the same objective, find the ratio of the least separation between two points to be distinguished by a microscope for light of 5000 Å and electrons accelerated through 100 V used as the illuminating substance.


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.


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