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What is black body radiation? what is the speciality of blak colour?

name the clour in the rainbow which has more wave length?


Black is not a colour it is actually a place where all the light is absorbed. since it absorbs all the light it heats up quickly and the heat it gives out is known as black body radiation. the colour in rainbow which has the most wavelength is red with a wavelength of 630-700 nm
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