# Why is power emission between one body and its surroundings equal to the difference of $T^4$?

According to the Stefan-Boltzmann Law: $$P=e\sigma AT^{4}$$ For any body However, the power it releases when its surroundings has a temperature $$T_s$$ is $$P=e\sigma A(T^{4}-T_{s}^{4})$$ (assuming that the body is hotter than its surroundings). Why is the power emitted also dependent on the temperature of the surroundings, and Why isn't it $$P=e\sigma A(T-T_{s})^{4}$$?

(Also, I'm a high school physics student, so I'll have trouble understanding more complex concepts)

$$P=(\epsilon\sigma T^4)A$$ is the power radiated by the object at a temperature $$T$$ irrespective of its surroundings. But the surroundings also emit radiation which is absorbed by the object which is proportional to the 4th power of the temperature of surroundings. So the net radiation emitted is the difference between the both.