Big Bang theory Flashcards
what evidence is there support the idea that the universe is expanding?
all the frequencies are lower in the spectrum that is the case for other objects. this tells us galaxies are moving away from us.
The further away the galaxy…?
the greater the redshift
describe the Big Bang theory?
the universe started as a single point that exploded in the big bang and has been expanding ever since.
what is cosmic microwave background radiation?
low frequency electromagnetic radiation coming from all part of the universe
how does the Big Bang theory explain CMBR?
at the beginning of the universe it was very hot and emitted high energy- high frequency radiation. universe cooled and radiation dropped in frequency and is now detected as the CMBR
what is one limitation of the Big Bang theory?
it doesn’t explain anything about the universe before the Big bang
