
Red shift blue shift
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is redshift?
Back
Redshift is the phenomenon where light from an object moving away from an observer is shifted towards the red end of the electromagnetic spectrum, indicating that the object is receding.
2.
FLASHCARD QUESTION
Front
What is blueshift?
Back
Blueshift is the phenomenon where light from an object moving towards an observer is shifted towards the blue end of the electromagnetic spectrum, indicating that the object is approaching.
3.
FLASHCARD QUESTION
Front
What does the Doppler effect describe?
Back
The Doppler effect describes the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.
4.
FLASHCARD QUESTION
Front
How do astronomers use redshift to determine the movement of galaxies?
Back
Astronomers observe the absorption spectra of galaxies; if the lines are shifted towards the red end, it indicates that the galaxy is moving away from us.
5.
FLASHCARD QUESTION
Front
What is the significance of the Hubble telescope in astronomy?
Back
The Hubble telescope allows astronomers to observe distant galaxies and celestial objects, providing insights into the universe's history and structure.
6.
FLASHCARD QUESTION
Front
What is the estimated age of the universe?
Back
Scientists estimate the universe is approximately 13.8 billion years old.
7.
FLASHCARD QUESTION
Front
What is the relationship between redshift and the expansion of the universe?
Back
Redshift is evidence of the expansion of the universe; as galaxies move away, their light shifts to red, indicating that the universe is expanding.
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