A spherical black body of radius r, The absolute temperature of X is double that of Y

A spherical black body of radius r, Consider space between spheres to y loss by thermal conduction and convection. ← Prev Question Next Question → 0 votes 15. Assume there is no energy loss by thermal absolute temperature T is surrounded by a thin sphes lack on both sides. Show that the factor by which this radiation shield reduces the rate of cooling of the body (consider space between spheres evacuated, with no thermal conduction losses) is given by the following A spherical black body of radius n radiates power p and its rate of cooling is R. Physics 303 November 25 and December 2, 2014 1. A spherical black body of radius r radiated power P at temperature T when placed in surroundings at temprature T 0(<<T) If R is the rate of colling . We would like to show you a description here but the site won’t allow us. We are asked to find the rate of cooling of the black body. X has a radius R and emits half the total power of Y. The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume u = V U ∝ T 4 and pressure p = 31(V U) If the shell now undergoes an adiabatic expansion, the relation between T and R is. then. Q. What P = 4 3 π r 3 D S d T d t Substitute the values of m and C in the above equation P = 4 3 π r 3 d T d t ∝ r 2 d T d t ∝ 1 R D S Therefore rate of fall in temperature is given by R ∝ 1 r So, the correct answer is “Option D”. If the radius were halved, and the temperature doubled, th X and Y are two spherical black-body radiators. 1k views A spherical black body of radius r at absolute temper and concentric shell of radius R, black on both sides. Jan 17, 2026 · Solution For A spherical black body of radius r radiates power P and its rate of cooling is R, where: (i) P \\propto r (ii) P \\propto r² (iii) R \\propt A spherical black body of radius r at absolute temperature T is surrounded by a thin spherical and concentric shell of radius R, black on both sides. Dec 11, 2019 · A spherical black body of radius r radiates power P, and its rate of cooling is R. Note: An object that absorbs all the radiation falling on it is called a black body at all wavelengths. A spherical black body of radius r at absolute temperature T is surrounded by a thin spher-ical and concentric shell of radius R, black on both sides. From the above question, we are given that the radius of the spherical block is r and it is radiating the power is P. Consider a spherical shell of radius R at temperature T. Show that the factor by which this radiation shield reduces the rate of cooling of the body (consider space between spheres evacuated, with no thermal conduction losses) is given by the following expression: a R^2 / (R^2+b r^2), and find the NTA Abhyas 2022: A spherical black body with a radius of 12cm radiates 450W power at 500K . The absolute temperature of X is double that of Y. evacuated.


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