The Power meter originally read 8 Watt from the light bulb, before these 3 \"ide

Question

The Power meter originally read 8 Watt from the light bulb, before these 3 "ideal" polarizers were put in the light's path, and the middle polarizer was rotated ? = 40 The Power meter originally read 8 Watt from the light bulb, before these 3 "ideal" polarizers were put in the light's path, and the middle polarizer was rotated ? = 40 The Power meter originally read 8 Watt from the light bulb, before these 3 "ideal" polarizers were put in the light's path, and the middle polarizer was rotated ? = 40

Explanation / Answer

4.695 [W]

W final =8*[cos(40)]^2=4.695 W

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