Answer to Question #208667 in Optics for Dini

Question #208667

The irradiance of a beam of natural light is 400 W/m². It impinges on the first of two consecutive ideal linear polarizers whose transmission axes are 40.0° apart. How much light emerges from the two?

Expert's answer

"I=I_0\\cos^2\\alpha,"

"I=400\\cdot \\cos^2 40\u00b0=235~\\frac{W}{m^2}."

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