Will a black body appear black at any temperature ? If so when ?

Explanation

To determine whether a black body will appear black at any temperature, we can analyze the properties of a black body and how it interacts with thermal radiation.

### Step-by-Step Solution:

1. **Definition of a Black Body**: A black body is defined as an idealized physical object that perfectly absorbs all incident electromagnetic radiation, regardless of the frequency or angle of incidence. It is also a perfect emitter of radiation when it is at thermal equilibrium.

2. **Emission of Radiation**: According to Planck's law, a black body emits radiation across a spectrum of wavelengths depending on its temperature. The intensity and wavelength of the emitted radiation are determined by the temperature of the body.

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