The luminosity and radius of the Sun are 
and 
respectively. Show that the temperature 
of the surface of the Sun is 
.
The wavelength 
of light for which the maximum rate of emission occurs from the Sun is 
. The temperature of the surface of the star Sirius is 
. Use information from (a) to determine the wavelength of light for which the maximum rate of emission occurs from Sirius.
.
