State the SI unit and dimensions of emissive power.

Explanation

To find the SI unit and dimensions of emissive power, we can follow these steps:

### Step 1: Understand Emissive Power
Emissive power is defined as the power emitted per unit area by a surface. It can be mathematically expressed as:
\[ \text{Emissive Power} = \frac{\text{Power}}{\text{Area}} \]

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