(a) Explain, using a suitable diagram, how unpolarized light gets linearly polarized by scattering.
(b) Describe briefly the variation of the intensity of transmitted light when a polaroid sheet kept between two crossed polaroids is rotated. Draw the graph depicting the variation of intensity with the angle of rotation. How many maxima and minima would be observed when `theta` vaeries from 0 to `pi` ?

Discuss the intensity of transmitted light when a polaroid sheet is rotated between two crossed polaroids?

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 ?

When a polaroid sheet is rotated between two crossed polaroids, the intensity of the transmitted will be maximum, when angle theta between pass axes is

(a) What is linearly polarized light ? Describe briefly using a diagram how sunlight is polarised. (b) Unpolarised light is incident on a polaroid. How would the intensity of transmitted light change when the polaroid is rotated?

(a) When an unpolarized light of intensity I_(0) is passed through a polaroid , what is the intensity of the linearly polarized light ? Does it depend on the orintation of the polaroid ? Explain your answer. (b) A plane polarized beam of light is passed through a polaroid . Show graphically the variation of the intensity of the transmitted light with angle of rotation of the polaroid in complete one rotation.

Explain with diagram, how plane polarized light can be produced by scattering of sunlight . An incident beam of light of intensity I_(0) is made to fall on a polaroid A. Another polaraid B is so oriented with respect to A that there is no light emerging out of B. A third polaroid C is now introduced mid-way between A and B is so oriented that its axis bisects that angle between the axes of A and B. Calculate the intensity of light transmitted by A,B and C.

(a) State law of Malus. (b) Draw a graph showing the variation of intensity (I) of polarised light transmitted by an analyser with angle (theta) between polariser and analyser. (c ) What is the value of refractive index of a medium of polarising angle 60^(@) ?

If a polarised light of intensity l_(0)//2 is passed through two polariods P_(1) and P_(2) as shown in figure. Then the intensity of light observed by an observer on other side of P_(2) (if the polaroid P_(1) is rotated clockwise) as a funtion of angle theta .

(a) What is plane polarised light? Two polaroid sare 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 between 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 transmitted through a polaroid which is rotated, does it mean that the light is un-polarised? Explain briefly.

Unpolarised light is passed through a polaroid P_(1) . When this poalrised beam passes through another polaroid P_(2) , and if the pass axis of P_(2) makes an angle theta with pass axis of P_(1) , then write the expression for the polarised beam passing through P_(2) . Draw a plot showing the variation of intensity when theta varies from 0 to 2 pi .