Unpolarized light with an intensity of 980 w m2 is, Ask an Expert

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Unpolarized light with an intensity of 980 W / m2 is incident on a polarizer with an unknown axis. The light then passes through a second polarizer with has an axis which makes an angle of 78.0 ° with the vertical. After the light passes through the second polarizer, its intensity has dropped to 180 W / m2. What is the angle between the axes of the polarizers?

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