A star behaves like a perfectly black body emitting radiant energy The ratio of radiant energy per second by this star to that emitted by another star having 8 times the radius of former, but having temperature, one-fourth that of the former in Kelvin is .

A star behaves like a perfect Black body emitting radiant energy. The ratio of radiant energy emitted per sec by this star to that emitted by another star having 8 times the radius of the former but having Kelvin temperature one fourth of the former is

A star behaves like perfeact Black body emitting radiant energy The ratio of radiant energy emitted per sec by this star to that emitted by an another star having having 8times the radius of the former but having Kelvin temperature one fourth of the former is .

If the temperatures of a perfectly black body measured in Kelvin is doulbed, then the energy radiated per second becomes

Two sphere made of the same material have their radii in the ratio of 2 : 1 . What is the ratio of the radiant energy emitted per second by them if both of them are at the same temperature ?

If the temperature of a hot body is increased by 50% then amount of radiant energy emitted by it increases approximately by

Energy emitted per second per unit area by Rigal star in Constellation Orion is 17000 times that emited by the sun. What is the surface temperature of that star if that of the sun is 6000K ?

Two spheres have radii 1m , 2m are at same temperatures, have emissivites e 2e then ratio of radiant energy emitted per second is .

The light emitted by the sun has maximum wavelength of 570 nm. The light emitted by another star has the maximum wavelength of 380 nm. What is the ratio of the surface temperatures of the star and the sun ?

The ratio of radiant energies radiated per unit surface area by two bodies is 16 : 1 , the temperature of hotter body is 1000 K , then the temperature of colder body will be