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Physics
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teacher
  • Member for 3 years, 7 months
  • Last seen more than a month ago
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question
4
Redshift of the Cosmic Microwave Background: increasing or decreasing?
Jul 3, 2021
question
2
What is the scale factor $a(t)$?
Jun 24, 2021
question
2
Does the cosmological redshift of the same object has a same value as it evolves
Jul 26, 2021
question
2
Is Hubble graph straight line or curve?
Sep 9, 2021
question
1
Kinematic behavior of a flat, a closed, an open universe
May 8, 2021
question
1
Is the cosmological Doppler effect more effective at long wavelengths?
Jun 2, 2021
question
1
Expansion velocity and recessional velocity
Jul 29, 2021
question
1
Explain Hubble's law using proper distance and comoving distance
Sep 18, 2021
question
1
Balmer alpha, beta line intensity
Oct 24, 2021
question
1
Korean SAT question error: Hubble law
Dec 21, 2021
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5
Spectrum features of main sequence and giant stars with the same spectral type