What will happen to the emission rate if the temperature of a black body is increased from 200 K to 400 K?

Explanation

To determine how the emission rate of a black body changes when its temperature is increased from 200 K to 400 K, we can use Stefan-Boltzmann Law, which states that the emission rate (E) of a black body is proportional to the fourth power of its absolute temperature (T).

### Step-by-Step Solution:

1. **Understanding the Stefan-Boltzmann Law**:
The law states that the emission rate \( E \) is given by:
\[
E = \sigma T^4
...