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The Q. is :
WHICH OF THE FOLLOWING IS MORE CLOSE TO A BLACK BODY?
A. Black Board Paint
A perfectly black body is one which absorb & emit radiation of all wavelength. Black is perfect ab. & emitter.
Black hole does not emit any radiation ; it just ab everything.
A. Black board paint
Since a black hole is one which can absorb every kind if energy even light cant escape from it.
From the above given options "black board paint" which can absorb most of light and reflects only some rays back
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