Principles of the use of stellar spectral classes (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What two properties are stars categorized by in stellar spectral classes?
What two properties are stars categorized by in stellar spectral classes?
Temperature & absorption line strength
Which spectral class exhibits the strongest hydrogen Balmer lines?
Which spectral class exhibits the strongest hydrogen Balmer lines?
A
What is the optimal temperature range in K for strong hydrogen Balmer lines?
What is the optimal temperature range in K for strong hydrogen Balmer lines?
7,500 - 11,000
Why are Balmer lines weak in very hot stars?
Why are Balmer lines weak in very hot stars?
Hydrogen becomes over-excited or ionized
From which energy level do electrons transition during Balmer line absorption?
From which energy level do electrons transition during Balmer line absorption?
What is the temperature range in K of O-class stars?
What is the temperature range in K of O-class stars?
25,000 - 50,000
What colour are M-class stars?
What colour are M-class stars?
Red
Which absorption lines are prominent in O-class star spectra?
Which absorption lines are prominent in O-class star spectra?
, ,
What is the temperature range in K of G-class stars?
What is the temperature range in K of G-class stars?
5,000 - 6,000
The presence of titanium oxide lines in a star's spectrum indicates which spectral class?
The presence of titanium oxide lines in a star's spectrum indicates which spectral class?
M