(a) On a day when the intensity of sunlight is 1.00 kW/m2
, a circular lens 0.200 m in diameter focuses light onto water in a black beaker. Two polarizing sheets of plastic are placed in front of the lens with their axes at an angle of 20.0∘
. Assuming the sunlight is unpolarized and the polarizers are 100% efficient, what is the initial rate of heating of the water in C∘/s
, assuming it is 80.0% absorbed? The aluminum
beaker has a mass of 30.0 grams and contains 250 grams of water. (b) Do the polarizing filters get hot? Explain.