Author Question: Stars on the main sequence with the greatest mass a. are spectral type M stars. b. are spectral ... (Read 74 times)

Tazate · **on:** Jul 27, 2018

Stars on the main sequence with the greatest mass

a. are spectral type M stars.
b. are spectral type O stars.
c. are located at the bottom of the main sequence in the H-R diagram.
d. have masses very similar to the Sun.
e. are spectral type O stars and are located at the bottom of the main sequence in the H-R diagram.

Question 2

What is the frequency of the shortest wavelength light that can be detected by the average human eye?

a. 0.0025 Hz
b. 7.5 1014 Hz
c. 3.0 108 m/s
d. 700 nm
e. 400 nm