Which of the following can be used to control the intensity of light, in sunglasses, window-panes, etc?

plane and transparent glass sheets

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Polaroids

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glass sheet with varying thickness

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All of the above

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Solution

The correct option is B Polaroids
Polaroids can be used to control the intensity in sunglasses, window-panes, etc. The intensity can be further controlled from $50 %$ to zero of the incident intensity by adjusting the angle between the pass-axes of two polaroids.

Hence, $(B)$ is the correct answer.

Suggest Corrections

Similar questions

Loud noise can break glass panes. Which of the following conclusions can be drawn from this?

I. Sound is a form of energy.

II. Sound can’t travel through vacuum.

III. Sound can be used to do work.

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2

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