Quasar Flashcards

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1
Q

Quasar

A

is an active galactic nucleus – a supermassive black hole surrounded by a disc of
matter which, as it falls into the black hole, causes jets of radiation to be emitted from the poles.

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2
Q

Quasar 3 features

A

● Extremely large optical red-shifts
● Very powerful light output
● Their size is not much bigger than a star

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3
Q

How do you estimate the power output of a quasar

A

using the inverse square law for intensity by using the amount of doppler shift experienced by the quasar to find their distance from Earth.

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4
Q

What are quasars thought to be

A

the most distant measurable objects in the known universe

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5
Q

What does the inverse square law show about quasars

A
  • extremely powerful
  • can have the same energy output as several galaxies.
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