Question

if r=1 then, it is a white body. is it true?​

Answer 1

Answer:

Yes

Explanation :

When reflectivity=1 the body completely reflects all the incident energy on it which is the characteristic feature of white body.

Answer 2

If r=1 , the body is a white body because it has perfect radiating capabilities.

The thermal properties of matter state that for a body the sum of r, t and a should be equal to 1 . For a white body, the value of t and a are both equal to zero so the value of r will be equal to 1. This makes the value of r equal to 1 which is a perfect characteristic of a white body.

The perfect radiating power is quite necessary for a body to be a true white body.