Unpolarized light with an intensity of (25.0 A) units is passed through two successive polarizing filters, the first with its polarization axis aligned with the vertical and the second with its polarization axis rotated (55.0 B) from the vertical. Find the intensity of the light after passing through the two polarizing filters.

The intensity of the light after passing through the two polarizing filters is 4.00 units

Explanation:

Io = 25 + A

= 25 + 9

= 34

Intensity of light through first polarizer,

I1 = Io/2

= 34/2

= 17 units

angle between axis of frist and second polarizers, theta = 55 + 6

= 61 degrees

Intensity of light passing through second polarizer,

I2 = I1*cos^2 (theta)

= 17*cos^2 (61)

= 4.00 units