A metal is heated in a furnace where a sensor is kept above the metal surface to read the power radiated (P) by the metal. The sensor has a scale that displays where is a constant. When the metal surface is at a temperature of 487 , the sensor shows a value 1. Assume that the emissivity of the metallic surface remains constant. What is the value displayed by the sensor when the temperature of the metal surface is raised to 2767 ?
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A black body radiates power P and maximum energy is radiated by it around a wavelength . The temperature of the black body is now changed such that it radiates maximum energy around the wavelength .The power radiated by it now is
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