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A Level Physics - Spectral Classes

Name the spectral classes' respective colour, temperature range and details about their absorption lines.
Temperature units are Kelvin
Quiz by Yosherax
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Last updated: January 8, 2019
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First submittedJanuary 8, 2019
Times taken21
Average score33.3%
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Question
Answer
What is the colour of stars in the O spectral class?
Blue
What is the colour of stars in the B spectral class?
Blue
What is the colour of stars in the A spectral class?
Blue-white
What is the colour of stars in the F spectral class?
White
What is the colour of stars in the G spectral class?
Yellow-white
What is the colour of stars in the K spectral class?
Orange
What is the colour of stars in the M spectral class?
Red
What is the maximum temperature of the O spectral class?
50,000
What is the minimum temperature of the O spectral class?
25,000
What is the maximum temperature of the B spectral class?
25,000
What is the minimum temperature of the B spectral class?
11,000
What is the maximum temperature of the A spectral class?
11,000
What is the minimum temperature of the A spectral class?
7,500
What is the maximum temperature of the F spectral class?
7,500
What is the minimum temperature of the F spectral class?
6,000
What is the maximum temperature of the G spectral class?
6,000
What is the minimum temperature of the G spectral class?
5,000
What is the maximum temperature of the K spectral class?
5,000
What is the minimum temperature of the K spectral class?
3,500
What is the maximum temperature of the M spectral class?
3,500
What is the minimum temperature of the M spectral class?
0
What are the strongest spectral lines in the O class?
Helium+ ion and helium
What other lines are present in the O class?
Hydrogen
What are the strongest spectral lines in the B class?
Helium and hydrogen
What is the most prevalent absorption in the A class?
Hydrogen
What other lines are present in the A class?
Metal ion
What are the strongest spectral lines in the F class?
Metal ion
What spectral lines are present in the G class?
Metal ion/atom
What are the most prevalent absorptions in the K class?
Metal atom
What spectral lines are present in the M class?
Atom and molecule
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