If a light beam shows no intensity variation when transmitted through a polarised, which is rotated, does it mean that light is unpolarized ?
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No, not necessarily. For example, consider light which is made up of electric field components `E_(x), E_(y)` with a `90^(@)` phase difference but equal amplitudes. The tip of electric vector executes uniform circular motion at the frequency of the light itself. This kind of light is said to be circularly polarized. When such light is passed through a polaroid, which is rotated, the transmitted average intensity remains constant.
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What is is plane polarised light ? Two polaroids are placed at 90^(@) to each other and the transmitted intensity is zero. What happens when one more polaroid is placed between these two, bisecting the angle betweeen them ? How will the intensity of transmitted light vary on further rotating the third polaroid ? (b) If a light beam shows no intensity variation when trasmitted through a polaroid which is rotated, does it mean that the light is un-polarised ? Explain briefly.
Define the term 'linearly polarised light'. When does the intensity of transmitted light become maximum, when a polaroid sheet is rotated between two crossed polaroids ?
Disuss the intensity of transmitted light when a polaroid sheet is rotated between two crossed polaroids ?
A polariser and an analyser are oriented so that the maximum amount of lights is transmmitted. Fraction of its maximum value is the intensity of the transmitted through reduced when the analyzer is rotated through (intensity of incident light = I_(o) ) , a) 30^(@) , b) 45^(@) , c) 60^(@)
An unpolarized light with intensity 2I_(0) is passed through a polaroid. The resultant intensity of the transmitted light will be
