1. When active and adaptive optics are in use, UNC's 4.1-meter diameter SOAR telescope will be able to resolve 2-micron light about as well as the 2.5-meter diameter Hubble Space Telescope, to about:

A. 0.12 arcseconds
B. 0.20 arcseconds
C. 1 arcsecond
D. 20 arcminutes
E. 32 arcminutes

EXAMPLE: The 2.5-meter diameter Hubble Space Telescope resolves sources of 1-micron wavelength light to about:
B. 0.1 arcseconds
B. q = 0.25" × (l / 1 mm) / (D / 1 m) = 0.25" × (1 mm / 1mm) / (2.5 m / 1 m) = 0.1"


2. Consider a planet that, given its albedo and distance from the sun, should have a surface temperature of 110 K, but instead has a surface temperature of 130 K because it has an internal source of heat. How much more energy is the planet emitting than receiving?

A. 1.2
B. 1.4
C. 1.7
D. 2.0