Question

Two stars, one classified A4 V and the other F8 V, have the same apparent magnitude. There is no significant amount of absorption of starlight by interstellar material. From this information we know that the A4 V star is ____ the F8 V star.

A) the A4 V star is closer to the Sun than F8 V.
B) the A4 V star is smaller than F8 V.
C) the A4 V star is farther from the Sun than F8 V.
D) both stars are at the same distance from Sun.

Answer 1

Answer: C

the A4 V star is farther from the sun than F8 V

Explanation:

An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen- burning) star of spectral type A and luminosity class stars of spectral type, the hot stars, have spectra characterized by very few spectral lines the A4 V star is farther from the sun than F8 V