An ideal black body is represented by
A metal coated with a black dye
A glass surface coated with coal tar
A hollow enclosure blackened from inside and having a small hole
A lump of charcoal heated to a high temperature
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The coefficient of transmission and coefficient of reflection for a given body at a given temperature are 0.33 and 0.64 respectively. Then the coefficient of emission of the same body at the same temperature will be