JEE Main 2002 Physics question

Which of the following is more closed to a black body?

(1)black board paintCorrect
(2)green leaves
(3)black holes
(4)red roses

Answer: (1)

Solution

A black body absorbs all radiation falling on it. Among ordinary surfaces, lamp-black / black board paint absorbs about 96–98% of incident radiation, so it is the closest practical approximation, option (1). Green leaves and red roses

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Question ID VK-037861