   Chapter 27, Problem 99PE

Chapter
Section
Textbook Problem

Integrated ConceptsSuppose you put on two pairs of Polaroid sunglasses with their axes at an angle of 15.0°. How much longer will it take the light to deposit a given amount of energy in your eye compared with a single pair of sunglasses? Assume the lenses are clear except for their polarizing characteristics.

To determine

How much time will it take the light to deposit given amount of energy?

Explanation

Given info:

Angle between sunglasses, θ=15°

Formula used:

The intensity of the transmitted wave is related to the incident wave by

I=Iocos2θ

Here,

I is the intensity of transmitted light

Io is the intensity of incident wave

θ is the angle between the direction of polarized light and the axis of polarizing filter

Calculation:

Let the intensity of sunlight passes from the single glass is Io

The intensity of the wave transmitted when two pairs of sunglasses are carrying

I=Iocos2θ

Plugging the values in the above equation<

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