Author Question: If a star has a parallax of 0.02 seconds of arc, then its distance is a. 20 pc. b. 50 pc. c. 2 ... (Read 29 times)

Jramos095 · **on:** Jul 27, 2018

If a star has a parallax of 0.02 seconds of arc, then its distance is

a. 20 pc.
b. 50 pc.
c. 2 pc.
d. 5 pc.
e. 500 pc.

Question 2

Blue light differs from red light in that

a. blue light has a higher energy than red light.
b. blue light has a lower energy than red light.
c. blue light has a shorter wavelength than red light.
d. blue light has a longer wavelength than red light.
e. More than one of the other choices are correct.