Absolute visual magnitude is
a. the apparent magnitude of a star observed from Earth.
b. the luminosity of a star observed from a distance of 1000 pc.
c. the apparent magnitude of a star observed from a distance of 10 pc.
d. the luminosity of a star observed from Earth.
e. the apparent magnitude of a star observed from a distance of 10 pc and the luminosity of a star observed from Earth.
Question 2
A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely
a. a small-diameter reflecting telescope.
b. a small-diameter refracting telescope.
c. a large-diameter refracting telescope.
d. a large-diameter reflecting telescope.
e. an infrared telescope.