Directions for Question: The questions consist of two statements each, printed as assertion and reason. While answering these questions you are required to choose any one of the following four responses:
Assertion: The radiation from the suns surface varies as the fourth power of its absolute temperature. Reason: The sun is not a black body. These questions consist of two statements each, printed as Assertion (A) and Reason (R). While answering these questions you are required to choose any one of the following four responses.A) If both A and R are true, and R is a correct explanation of the A.
B) If both A and R are true, but R is not a correct explanation of the A.
C) If A is true, but R is false.
D) If both A and R are false.
Correct Answer: C
Solution :
At as high a temperature as 6000 K, the sun acts like a perfect blackbody emitting complete radiation. Thats why the radiation coming from the suns surface follows Stefens law which states that the energy radiated per unit area per unit time varies as the fourth power of absolute temperature, i.e. \[E=\sigma {{T}^{4}}\]
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