then the number of photons per second of infrared radiation produced by an infrared lamp

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Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiation is assumed to be 1500nm, then the number of photons per second of infrared radiation produced by an infrared lamp, that consumes energy at the rate of 100W and is 12% efficient only, is (x × 10^19 ). The value of x is: [Given: h=6.625×10^−34 J−s]
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Nov
Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiation is assumed to be 1500nm, then the number of photons per second of infrared radiation produced by an infrared lamp, that consumes [...]
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Tags: Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water , is (x × 10^19 ). The value of x is: [Given: h=6.625×10^−34 J−s] , raising its temperature and that of the food. If the wavelength of infrared radiation is assumed to be 1500nm , that consumes energy at the rate of 100W and is 12% efficient only , then the number of photons per second of infrared radiation produced by an infrared lamp ,