1. The ____ of a star is a measure of the total energy radiated by the star in one second.
absolute visual magnitude
apparent visual magnitude
luminosity class
spectral type
luminosity
2. The sun has a surface temperature of approximately 5,800 K. At what wavelength does the maximum energy radiated by the sun occur?
5,800 nm
300 nm
174 nm
520 nm
3,000 nm