Home
Class 12
PHYSICS
Two polarising plates have polarising di...

Two polarising plates have polarising directions parallel score to trasmit maxmum intensity of light through what angle most either plate be turned in the intensites of the transmitted beam is to drop by half?

Text Solution

Verified by Experts

Therefore` `costheta=pm(1)/(sqrt2)`  `rArr`   `theta=pm45^(@)`or `pm135^(@)`
The effect will be same when any of the two sheets is turned through `theta` in any direction.
Promotional Banner

Similar Questions

Explore conceptually related problems

Two polarising sheets have their polarising directions parallel to each other so that the intensity of transmitted light is maximum. The angle through wihich the either sheet must be turned so that intensity becomes one half the intial value is

Two polarising sheets are placed with their planes parallel, so that light intensity transmitted is max. Through what angle must either sheet be turned so that light intensity drops to half the maximum value ?

Unpolarised light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam?

Two 'crossed' polaroids A and B are placed in the path of a light-beam. In between these, a third polaroid is C is placed whose polarisation axis makes an angle theta with a polarisation axis of the polaroid A. If the intensity of light emerging from the polaroid a is I_(o) then the intensity of light emerging from polaroid B will be

What is meant by a linearly polarised light? Which type of waves can be polarised? Briefly explain a method for producing polarised light. Two polaroids are placed at 90^(@) to each other and the intensity of transmitted light is zero. What will be the intensity of transmitted light when one more polaroid is placed between these two bisecting the angle between them ? Take intensity of unpolarised light as I_(0)

How does an unpolarised light get polarised when passed through a polaroid ? Two polaroids are set in crossed positions . A third polaroid is placed between the two making an angle theta with the pass axis of the first polaroid . Write the expression for the intensity of light transmitted from the second polaroid . In what orientations will the transmitted intensity be (i) minimum and (ii) maximum ?

(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.

A polariser and an analyser are oriented so that maximum light is transmitted what will be the intensity of outcoming light when analyer is rotated through 60^(@) .

Unpolarized light of intensity 32 Wm^(-3) passes through three polarizers such that the transmission axis of the last polarizer is crossed with the first. If the intensity of the emerging light is 3 Wm^(-2) , what is the angle between the transmission axces of the first two polarizers ? At what angle will the transmitted intensity be maximum ?

Unpolarised light of intensity 32 Wm^(-2) passes through three polarisers such that the transmission axis of the last polariser is crossed with first. If the intensity of the emerging light is 3Wm^(-2) , the angle between the axes of the first two polarisers is