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4. Light is reflected off the rear windshield of a car.

When the Polaroid is rotated so that the 0 degree or 360 degree mark is at the top, the transmitted intensity is minimum, while at 90 degrees and 27- degrees it is maximum. Explain why this variation in intensity occurs.

5. What is the direction for the axis of polarization of the light reflected from the windshield in (4) - up and down or side-to-side?

If you were designing Polaroid sunglasses, in which of the following directions should the axis of the Polaroid point? Explain your answer.

https://brainmass.com/physics/intensity/light-variation-intensity-axis-polarization-392350

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This is because of polarization due to reflection. The light reflected of the rear windshield is partially polarized and thus if the polarized light is viewed from a Polaroid the intensity of light transmitted from it varies as the angle between the axis varies. When the axis of Polaroid is parallel to the axis of polarization of light the transmitted intensity is the maximum and when the axis of Polaroid is perpendicular to the axis of polarization of light the transmitted intensity is a minimum.

As the intensity of light transmitted through polarized is maximum when 900 or 2700 is at the top it means that the maximum intensity occurs when the axis of Polaroid is horizontal. Thus the axis of polarization of the reflected beam must be side to side (horizontal).

The correct choice is E a different orientation.

In all other cases the axis of the Polaroid for the two eyes are the same and thus if polarized light with an axis of polarization perpendicular to the direction of axis of Polaroid, the intensity of light transmitted will be zero and the light will not reach eyes and nothing will be seen. But if the axis of the two Polaroid is in different orientation, the intensity will not reduced to zero in one of two even if the intensity for one is turns out to be zero and thus we can see some light. The axis of both will not be simultaneously perpendicular to the axis of polarization for both glasses.

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