What is a polaroid ?

Which of this is not an application of polaroid ?

Which of the follwing is NOT the use of polaroid ?

State applications of polaroids .

What is a phasor ?What is phasor diagram?

Unpolarized light with intensity I_0 is incident on two polaroids. The axis of the first polaroid makes an angle of 50^@ with the vertical, and the axis of the second polaroid is horizontal. What is the intensity of the light, after it has passed through the second polaroid?

Sun glasses are polaroid because

A polaroid (i) is placed in front of a monochromatic source. Another polaroid (ii) is placed in front of this polaroid (i) and rotated till no light passes. A third polaroid (iii) is now placed in between (i) and (ii).In this case, will light emerge from (ii) . Explain.

When a polaroid is rotated, the intensity of light is not found to vary. The incident light may be

When a polaroid is rotated, the intensity of light is not found to vary. The incident light may be