physics

posted by .

Unpolarized light with an average intensity of 750.0W.m^2 enters a polarizer with a vertical trasmission axis. the transmitted light then enters a second polarizer. the light that exits the second polarizer is found to have an average intensity of 125 W/m^2. what is the orintation angle of the second polarizer relative to the first one?

• physics -

The actual angle depends upon the losses of the polarizers. For sheet Poloroid film, these losses are about 50% per sheet, in addition to the fraction that is lost due to polarization.

Only crystal prism polarizers (Nicol, Glan-Thompson, Wollaston etc.) are lossless. They are actually beam separaters, and are based on double refraction.

I will assume there are no losses in the preferred plane of polarization. Call the orientation angle theta. It is the rotation angle between the two preferred planes of polarization.

In your case, 1/6 of the light gets through the pair.
Cos(theta)^2 = 1/6
Cos theta = 0.408
theta = 66 degrees.

Similar Questions

1. physics

unpolarized light with an average intensity of 750.0W/m^2 enters a polarizer with a vertical transmission axis. the transmitted light then enters a second polarizer. the light that exits the second polarizer is found to have an average …
2. physics

The angle between the polarizer transmission axis and the plane of polarization of the incoming light is 30 +/- 2 deg. If the incident light intensity Io is 100 W/cm2 what would be the intensity I after the light is transmitted through …
3. Physics 2

The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the …
4. physics

Linearly polarized light is incident on a piece of polarizing material. What is the ratio of the transmitted light intensity to the incident light intensity when the angle between the transmission axis and the incident electric field …
5. Physics

A beam of polarized light with an average intensity of 17.1 W/m2 is sent through a polarizer. The transmission axis makes an angle of 27° with respect to the direction of polarization. Determine the rms value of the electric field …
6. physics

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. Only 98% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. No light passes …
7. physics

Unpolarized light from an incandescent lamp has an intensity 112.0 Cd as measured by a light meter. a) What is in Cd the intensity reading on the meter when a single ideal polarizer is inserted between the bulb and the meter?
8. Physics

If the angle between the polarizer and the analyzer is 30 degrees, what light intensity would be transmitted through the polarizer and analyzer, respectively?
9. Physics

A beam of partially polarized light can be considered to be a mixture of polarized and unpolarized light. Suppose a beam of partially polarized light is sent through a polarizing filter. The polarization direction of the filter can …
10. Physics (Waves)

Determine the intensity of light passing through a polarizer-analyzer combination with an angle of 45° between them.

More Similar Questions