Can i get help with this black body radiation questions : b) Calculate the wavelength of a photon which has an energy of 3.79 × 10−19J. (What colour of light does this wavelength correspond to?) c) What is the temperature of a star which has a blackbody peak wavelength of 500 nm? d) What is the peak emission frequency of a star which has a blackbody temperature of 10000 K?

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de Broglie Equation

The sketch of matter waves is drawn below: