The total energy radiated from a block body source at constant temperature is collected for one minute and is used to heata quantity of water. The temperature of water is found to increase from `20^(@)C` to `20.5^(@)C`. If the absolute temperature of the blackbody is doubled and hte experiment is repeated with the same quantity of water of `20^(@)C`, the temperature of water will be:

Options

A. `21^(@)`
B. `22^(@)C`
C. `24^(@)C`
D. `28^(@)C`

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the initial conditions
We have a black body radiating energy at a constant temperature. The initial temperature of the water is \( T_1 = 20^\circ C \) and it increases to \( T_2 = 20.5^\circ C \). The change in temperature of the water is:
\[ \Delta T_1 = T_2 - T_1 = 20.5^\circ C - 20^\circ C = 0.5^\circ C \]

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