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Three polarizing filters are stacked, with the polarizing axis of the second and third filters at...

Three polarizing filters are stacked, with the polarizing axis of the second and third filters at 21.0° and 63.0°, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 78.0 W/cm2 after it passes through the stack. If the incident intensity is kept constant, what is the intensity of the light after it has passed through the stack if the second polarizer is removed?

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