Transmission Of Heat Question 20
Question: Assertion : All black coloured objects are considered black bodies. Reason : Black colour is a good absorber of heat.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: E
Solution:
It is not necessary that all black coloured object are black bodies. For example, if we take a black surface which is highly polished, it will not behave as a perfect black body. A perfectly black body absorbs all the radiations incident on it.
BETA
