Working of 3d Glasses

Q.

Plane polarised light is passed through a polaroid. On viewing through the polaroid we find that when the polaroid is given one complete rotation about the direction of the light, one of the following is observed

[MNR 1993]

1. The intensity of light gradually increases to a maximum and remains at maximum

2. The intensity of light is twice maximum and twice zero

3. There is no change in intensity

4. The intensity of light gradually decreases to zero and remains at zero

Q. When both the components of electric field of light waves are present, such that one is stronger than the other. When such light is viewed through a rotating analyzer, one sees a maximum and a minimum of intensity but not a complete darkness. This kind of light is called,

1. Polarized
2. linearly polarized
3. partiallly polarized
4. None of these