The value of Stefan-Boltzmann constant in SI units is ..........

Explanation

To find the value of the Stefan-Boltzmann constant in SI units, we can follow these steps:

### Step 1: Understand the Stefan-Boltzmann Law
The Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body is directly proportional to the fourth power of its absolute temperature (T). This relationship can be expressed mathematically as:
\[ E = \sigma T^4 \]
where \( E \) is the emissive power, \( T \) is the absolute temperature, and \( \sigma \) is the Stefan-Boltzmann constant.

### Step 2: Identify the SI Units
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