Start Free Mock LoginAlready registered? Login here

Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferHard2 min

PhysicsHardmultiple choice

A planet at distance $r$ from a star is in thermal balance as a black body, with the intensity of starlight $S \propto \frac{1}{r ^{2}}$ . Which statements are correct?

Options:(select one or more)

Answer:

A, B

Solution:

Balance gives $S \propto T^{4}$ , so $T \propto S^{\frac{1}{4}}$ . With $S \propto r^{- 2}$ , $T \propto r^{- \frac{1}{2}}$ . A and B.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

Doubts & Discussion

Loading discussions...