Red Shift Flashcards

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1
Q

How to the wavelength of light increase?

A

As it travels across the spectrum from blue shift to red shift

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2
Q

What is the red shift?

A

The light waves are stretched out of the star/galaxy is moving away from us

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3
Q

What is the blue shift?

A

The light waves are squashed together if the star/galaxy is moving towards us

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4
Q

How do you get a bigger shift between star/galaxy?

A

The fast the star or galaxy is moving towards or away from us

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5
Q

Wha are red shift and blue shift exiles of?

A

The Doppler effect

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6
Q

What is the Doppler effect?

A

The change in the observed wavelengths of waves due to the motion of the source towards or away from the observer

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7
Q

Who discovered the doppler effect?

A

Christian Doppler in 1842 using sound waves

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8
Q

What did Edwin Hubble and what year?

A

That the light from distant galaxies was ‘red - shifted.’

He found that the further a Galaxy is from us, the bigger its red shift is in 1929

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9
Q

What is the whole universe doing?

A

The whole universe is expanding

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10
Q

How far are the most distant galaxies?

A

About 13 000 million light years away

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11
Q

What can we use to split the light into a spectrum?

A

A prism

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