Is it neccesary that all black coloured bodies to be regarded as perfectly black bodies ?

Explanation

To determine whether all black-colored bodies can be regarded as perfectly black bodies, we need to understand the definition of a perfect black body and the characteristics of black-colored bodies.

### Step-by-Step Solution:

1. **Definition of a Perfect Black Body**:
A perfect black body is defined as an idealized physical object that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. This means it does not reflect any radiation and is a perfect absorber.

2. **Characteristics of Black-Colored Bodies**:
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