Multiple Choice
If a certain star shows a strong absorption spectrum in hydrogen Balmer lines,the surface temperature of the star is hot enough that collisions between atoms there:
A) ionize virtually all of the hydrogen atoms.
B) promote electrons in many hydrogen atoms to the n = 2 energy level.
C) promote electrons in many hydrogen atoms to the n = 3 energy level.
D) convert many helium atoms to hydrogen atoms.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: A star has an absolute magnitude M
Q4: White dwarfs are not included in the
Q5: The spectral luminosity class of the star
Q6: As you move upward and to the
Q7: Two of the brightest stars in Orion
Q9: A red supergiant star is found to
Q10: Which spectral classification letter signifies the hottest
Q11: The following expressions are parameters of stars
Q147: The star Elnath is classified as B7
Q252: Luminosity is measured in<br>A) watts.<br>B) watts per