8d: Cosmology

What are the pieces of evidence to support the big bang theory?

• Stellar evolution
• redshift
• redshift of galaxies
• CMBR (cosmic microwave background radiation)

If a galaxy moves away from you, frequency of light produced…

• increases
• decreases
• remains constant

If a galaxy moves away from you, wavelength of light detected…

• increases
• decreases
• remains constant

(In general,) the further away a galaxy is…

• the greater the redshift.
• the lower the redshift.
• doesn't affect redshift

The greater the redshift...

• the faster the object is moving
• the slower the object is moving
• the hotter the object
• the colder the object

Redshift shows that as distance increases, speed increases. What does this imply?

• The universe was significantly hotter a long time ago
• The universe is expanding
• The universe has a finite size
• The galaxy is expanding