Question

it is a brainluest question answer at your own risk no cheating .. determine the radius of star Keplela, some point for help 1)it has BVmag of 0.8 and T=4940kelvin 2)luminosity formula is used 3)boltzman constant is 5.67×10^-8 watts/m^2 k^4?

ANSWER SHOULD BE WITH USE FORMULA AND EXPLANATION OTHERWISE IT WOULD BE REPORTED​

Answer 1

Answer:

ε = emittance = ratio of radiant energy emission of the surface to that of a black body at the same temperature. σ = Stefan-Boltzmann constant = 5.67 × 10−8 W m−2 K−4.