Author Question: A filtergram is a photograph of the Sun's surface made a. in a band of wavelengths in the ... (Read 29 times)

madam-professor · **on:** Jul 27, 2018

A filtergram is a photograph of the Sun's surface made

a. in a band of wavelengths in the infrared.
b. in a band of wavelengths in the ultraviolet.
c. using the Zeeman effect.
d. with only those photons emitted in a specific spectral line.
e. none of the others.

Question 2

The purpose of using epicycles and deferents to explain the motion of the planets in the night sky was to account for

a. prograde motion.
b. Mercury's and Venus's limited angular distance from the Sun.
c. retrograde motion.
d. non-uniform speed of the planets in their orbits.
e. precession of the equinoxes.