Astronomical Applications of Spectroscopy (HSC SSCE Physics): Quizzes
📚Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the correct order of spectral classes from hottest to coolest stars?
What is the correct order of spectral classes from hottest to coolest stars?
OBAFGKM
What colour do stars with a surface temperature of approximately appear?
What colour do stars with a surface temperature of approximately appear?
Blue
Why do very hot O-type stars show no hydrogen absorption lines in their spectra?
Why do very hot O-type stars show no hydrogen absorption lines in their spectra?
Hydrogen is completely ionised
What does a blue shift in a star's spectrum indicate about its motion?
What does a blue shift in a star's spectrum indicate about its motion?
Star is moving towards us
What effect does stellar rotation have on spectral lines?
What effect does stellar rotation have on spectral lines?
Lines appear broader
How do lower density stellar atmospheres affect spectral lines?
How do lower density stellar atmospheres affect spectral lines?
Lines become sharper and narrower
How is a star's chemical composition determined using spectroscopy?
How is a star's chemical composition determined using spectroscopy?
By matching absorption line patterns
Who was the first scientist to declare authoritatively that the Sun is a star?
Who was the first scientist to declare authoritatively that the Sun is a star?
Angelo Secci
At what temperature do A-type stars show the strongest hydrogen Balmer series lines?
At what temperature do A-type stars show the strongest hydrogen Balmer series lines?
How do giant stars' spectral lines differ from Main Sequence stars of the same spectral type?
How do giant stars' spectral lines differ from Main Sequence stars of the same spectral type?
Giants have finer lines