Universe Origin Flashcards
What is red-shift?
The name we use to describe the increasing of the wavelength of light
What is the Big Bang theory?
The concept that an explosion occurred at the beginning of our universe and expanded from the point onwards
What is the Doppler effect?
The observed change in wavelength and frequency of a wave as the source moves relative to the observer
What evidence supports the expansion of the universe?
Other galaxies are red-shifted
What are the effects of the Doppler effect? (Source is moving towards you)
The frequency seems higher
The wavelength seems shorter
Approximately how long ago was the Big Bang?
13.7 billion years ago
What evidence is there against the Steady State theory?
Cosmic microwave background radiation (CMBR)
What evidence is there against the Big Bang theory?
The expansion of the universe appears to be speeding up
