Quasar Flashcards
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.
2
Q
Quasar 3 features
A
● Extremely large optical red-shifts
● Very powerful light output
● Their size is not much bigger than a star
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.
4
Q
What are quasars thought to be
A
the most distant measurable objects in the known universe
5
Q
What does the inverse square law show about quasars
A
- extremely powerful
- can have the same energy output as several galaxies.
