Question

Polaroid glass is used in sunglasses because

• A. It reduces the light intensity to half on account of polarization
• B. It is fashionable
• C. It has good color
• D. It is cheaper

Answer 1

The correct option is A

It reduces the light intensity to half on account of polarization

The explanation for the correct option:

In the case of option A,

1. The electric field component of unpolarized light is confined to one direction in one plane when it travels through a polariser.
2. The light intensity is cut in half as a result of this polarization.
3. Thus, the eyes feel more comfortable and the spectator can see better due to the polaroid glass used in sunglasses.

The explanation for the incorrect options

In the case of option B,

1. Polaroid glasses may be in fashion but the main cause of using these glasses is to safeguard your eyes.

In the case of option C,

1. Polaroid glasses may have a decent color of lenses but the main reason for using these glasses is to safeguard your eyes and block the glare.

In the case of option D,

1. Polaroid glasses are expensive compared to other glasses that are suitable for wearing.

Hence, option A is the correct answer.