Problem #1: The surface of a star has a
temperature of 3800 K and emits as a blackbody.
a) At what wavelength does this star emit the most light?
b) What color would this star appear to be to the human eye?
Problem #2: a) I have two spheres, one
with a radius of 0.2 m and the other with a radius of 0.5 m. I heat the
small one to a temperature of 2400 K, and the big one to a temperature of
of 2100 K.
a) What is the ratio of the intensities of the two spheres?
b) What is the ratio of the total power emitted
by these spheres?
Problem #3: Calculate the total power emitted at all wavelengths by a star whose surface temperature is 7300 K, and whose radius is 2.5 solar radii. (You may assume that the star radiates as a blackbody.)