$A$ hot and a cold body are kept in vacuum separated from each other. Which of the following causes a decrease in the temperature of the hot body?

$A$ body has a transmission power of $1/6$ and a reflection power of $1/3$. Find its absorption power.

The graph shows the blackbody radiation curves at temperatures $T_1$ and $T_2$. Which of the following is correct? $(T_2 > T_1)$

Which of the following statements is true for a perfectly black body?

Three objects colored black,gray,and white can withstand hostile conditions up to $2800\,^oC$. These objects are thrown into a furnace where each of them attains a temperature of $2000\,^oC$. Which object will glow brightest?

$A$ sphere,a cube,and a thin circular plate,all made of the same material and having the same mass,are heated to the same temperature of $200^{\circ} C$. When these are left in a room,which one reaches room temperature the fastest?