Question

Assertion: The temperature of the surface of the sun is approximately `6000 K`. If we take a big lens and focus the sun rays, we can produce a temperature at `8000 K`
Reason: This highest temperature can be produced according to second law of thermodynamics.

Answer 1

Correct Answer - It will amount to transfter of heat from a body at lower temperature to body at higher temperature wothout the aid of an external agent. Since it is against second law of thermodynamics, if is not possible to produce temperature of `8.000K` by collecting the sun rays with a lend.