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Chapter 5: Q16DQ (page 1104)

If you sit on the beach and look at the ocean through Polaroid sunglasses, the glasses help to reduce the glare from sunlight reflecting off the water. But if you lie on your side on the beach, there is little reduction in the glare. Explain why there is a difference.

Short Answer

Expert verified

There is a difference because the light is filtered out on one case, whereas not filtered in the other.

Step by step solution

01

Definition of Polarization and Polaroid glass uses

The process of transforming unpolarized light into polarized light is known as polarization. Polarized light waves are the light waves in which the vibrations occur in a single plane.

Polarized glasses reduce the glare of light around you, whether it is coming directly from the sun, from the water, or even from snow.

02

Determine the reason for difference

If one sits on the beach and looks at the ocean through Polaroid sunglasses, the glasses help to reduce the glare from sunlight reflecting off the water. But if one lies on his side on the beach, there is little reduction in the glare. This happens because the axis of the polarization gets aligned with the polarized light reflected on the sea surface and it passes freely through one鈥檚 glasses when one lies on his side, whereas when one sits, this axis is perpendicular to the polarization of reflected sunlight and they are filtered out.

Therefore, the reason for this difference is the change in the polarization axis and thus the filtering of light.

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