There is a rough black spot on a polished metallic plate. It is heated upto $1400\ K$ approximately and then at once taken in a dark room. Which of the following statements is true

Question

Dr. Abubacker · Accepted Answer

(a) The black spot on heating absorbs radiations and so emits them in the dark room while the polished shining part reflects radiation and absorbs nothing and so does not emit radiations and becomes invisible in the dark

Q. There is a rough black spot on a polished metallic plate. It is heated upto $1400\ K$ approximately and then at once taken in a dark room. Which of the following statements is true

Explanation

Reviewed by Dr. Abubacker

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