The radiant energy from the Sun incident normally at the surface of earth is `20kcal//m^(2)` min What would have been the radiant energy incident normally on the earth if the sun had a temperature twice of the present one ? .

The radient energy from the sum incident normally at the surface of earth is 20 k cal/ m^(2) min. What would have been the radiant energy incident normally on the earth, if the sum had a temperature twice of the present one.

What would be the average duration of year if the distance between the Sun and the Earth becomes twice the present distance.

Area of a surface is 1256 m^(2) . If 25 Js^(-1) radiant energy is incident on it at each second and absorbed completely, then find Magnitude of energy density

Area of a surface is 1256 m^(2) . If 25 Js^(-1) radiant energy is incident on it at each second and absorbed completely, then find Wave intensity

Area of a surface is 1256 m^(2) . If 25 Js^(-1) radiant energy is incident on it at each second and absorbed completely, then find E_(rms)

Area of a surface is 1256 m^(2) . If 25 Js^(-1) radiant energy is incident on it at each second and absorbed completely, then find B_(rms)

A body is in thermal equilibrium with surrounding. Absorptive power of the surface of the body is a = 0.5 . E is the radiant energy incident in unit time on the surface of the body. How much energy propagates from its surface in unit time?