Question

which of the following is best close to an ideal black body

a) black lamp
b) cavity maintained at constant temperature
c) platinum black
d) a lump of charcoal heated to high temperature

Give me correct answer with explanation...​

Answer 1

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$\huge {\bold {\red {ASSALAMUALAIKUM}}}$

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✒An ideal black body is one which absorb all the incident radiation without reflecting or transmitting any part of it and black lamp absorbs approximately 96% of incident radiation.

Hence option (a) is the correct answer!

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Answer 2

Answer:

cavity maintained at constant temperature .

explanation :

an ideal black body is one which absorbs all the incident radiation without reflecting or transmitting any part of it black lamp absorbs approximately 96% of incident radiation .

an ideal black body can be realised in practice by a small hole in the wall of the hollow body which is at uniform temperature any radiation entering the hollow body draw the whole suffers a number of reflections and ultimately gets completely absorbed . this can be facilitated by coating the interior surface with black so that about 96% of the radiation is absorbed at each reflection . the portion of the interior surface opposite lo the hole is made conical avoid the escape of the reflected ray after one reflection .

my answer is correctly right .

hope its help you !!!

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no his answer is wrong

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