ASTR 1050

Astr 1050 Homework 5

Question 3: At what wavelength, approximately, does the spectrum of a 10000 K type A star peak?

a.300 nm

b.500 nm

c.600 nm

d.800 nm

e.1.2 microns or 1200 nm

Question 4: If star A has a temperature of 4000 Kelvin and star B has a temperature of twice that, or 8000 Kelvin, how much more energy does it radiate per second than star A?

From the Steffan-Boltzmann Law, we know that for the radiated energy, E goes as T to the 4th power, so 24 = 16 times