A beam of unpolarised light with a power of 70 mw is passed, Ask an Expert

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A beam of unpolarised light with a power of 70 mW is passed through two polarisers in series, with their polarisation directions parallel to each other. The first has a transmittance T = 0.75, and the second has T = 0.65. What is the maximum power that can be transmitted through the two?

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