A body having a temperature of `27^@C` is kept in a room having a temperature of `27^@C` . Does the body emit any radiation in this case when the room temperature is the same as body temperature ?

Options

A. Yes
B. No
C. May emit , depends on the material of body
D. Can't say anything

Answer

To solve the question, we need to analyze the situation where a body at a temperature of 27°C is placed in a room at the same temperature of 27°C. We want to determine if the body emits any radiation under these conditions.

### Step-by-Step Solution:

1. **Understanding Temperature and Radiation**:
- All bodies emit thermal radiation if their temperature is above absolute zero (0 K or -273.15°C). This is a fundamental principle of thermodynamics.

2. **Convert the Temperature**:
- The given temperature of the body and the room is 27°C. To understand this in terms of absolute temperature, we convert it to Kelvin:
\[ T(K) = T(°C) + 273.15 \]
\[ T = 27 + 273.15 = 300.15 \, K \]

3. **Check if the Body Emits Radiation**:
- Since the temperature of the body is 300.15 K, which is greater than 0 K, the body will emit thermal radiation according to the Stefan-Boltzmann law.

4. **Conclusion**:
- Therefore, even though the body and the room are at the same temperature, the body will still emit radiation because it is above absolute zero.

### Final Answer:
Yes, the body will emit radiation.

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