The Universe Flashcards
1
Q
How is an absorption spectra produced?
A
Light is emitted from a source and passes through a gas.
2
Q
What does redshift means?
A
The lines move more to the red end the wavelengths get longer meaning this increases with distance
3
Q
What produces dark lines in an absorption spectrum?
A
The dark lines represent wavelengths of light that have been absorbed by elements in the gases in the star’s atmosphere
4
Q
How does cosmic background radiation support the Big Bang Theory
A
-High energy Gamma radiation released at the Big Bang the universe is expanding the wavelength of these waves has been stretched to become microwave radiation.
5
Q
What is a light year?
A
Distance travelled by light in 1 year
