P1.6 Red Shift and Big Bang Flashcards

1
Q

What is red shift?

A

The increasing of the wavelenth of light as a galaxy is moving away from us.
We see a red-shirt from most galaxies.

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2
Q

What does the red shift tell us about galaxies?

A

The further away the galaxies are the bigger the red shift.

The further away galaxies are the faster they are moving.

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3
Q

What is the cosmic microwave background radiation?

A

CMBR is a form of electromagnetic radiation filling the universe.

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4
Q

How does the cosmic microwave background radiation support the big bang theory?

A

It is evidence of the large explosion at the start of time.

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5
Q

What is the big bang theory?

A

The ‘big bang’ theory says that the universe began from a very small initial point.

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6
Q

How does red shift support the big bang theory?

A

Red shift from galaxies provides evidence that the universe is expanding.
An expanding universe must have originates from a very small initial point.

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