Polarization MSQ - IIT JAM MCQ

c) The refracted light is partially polarized.
d) The reflected light is almost completely polarized with vibrations parallel to the plane of incidence.

Reasoning:

• (c) The refracted light is partially polarized as it passes into the glass medium, aligning some of its vibrations.
• (d) The reflected light, due to multiple reflections, becomes almost completely polarized, with its vibrations aligned parallel to the plane of incidence (true for near-Brewster conditions).

Why not the others?

• (a) Incorrect: Refracted light does not have vibrations perpendicular to the plane of vibration; this is a misstatement.
• (b) Incorrect: Reflected light is only completely polarized at Brewster’s angle, which is not stated in the question. In general, it is almost completely polarized.

Thus, (c) and (d) are correct.

The correct answers are: The incident light could have vibration parallel to the optic axis, The incident light could have vibration perpendicular to the optic axis

The correct answers are: Can be circularly polarized , Can be elliptically polarized

The correct answer is: The resulting light is plane polarized

The correct option is Option D.

When a beam of unpolarized light is incident on the glass block, a certain amount of the incident vibration is reflected in a plane perpendicular to the plane of incidence and transmits the rest.

Thus, the reflected ray is completely polarized and not partially polarized.

The correct answers are: Plane polarized light has varying intensity when seen through a rotating nicol prism and a zero minimum intensity, Circularly polarized light has no variation in intensity when seen through a rotating nicol prism, Elliptically polarized light varies in intensity when seen through a rotating nicol prism, with a non zero minimum intensity

The correct answers are: The emergent light can be circularly polarized, The emergent light can be unpolarized

The correct answers are: The incident light has vibrations at an angle 30° with the optic axis, The incident light could have vibrations at an angle 60° with the optic axis, The incident light could have vibrations at any angle other than 0, 45° or 90° with the optic axis.

The correct answers are: The phase difference between the electric vector of the two superposing waves, The amplitudes of the superposing waves

The correct answer is: The emergent light is linearly polarized