Question

Two spherical black bodies of radii r1 and r2. Their surface temperature are t1 and t2 they radiate same power then r2/r1 is

Answer 1

Answer:

Explanation:

The formula for radiating power is

P=esAT^4

A is area

Since the power is same area is inversely proportional to 4th power of temperature

And area is directly proptional to 2nd power of radius so,

r1^2/r2^2=t2^4/t1^4

r1/r2=t2^2/t1^2

That is the ratio of radius of two spheres is equal to ratio of temperature of 2nd sphere to 1st sphere whole square

Hope u understand the answer

Answer 2

All objects emit electromagnetic radiation according to their temperature. A black body is an idealized object that absorbs all electromagnetic radiation