Exploring the Mysteries of Quasars

What is a quasar?

• A type of star

• A supermassive black hole with an accretion disc

• A small galaxy

• A neutron star

How do quasars form?

• From the collision of two stars

• From the accretion of material onto a supermassive black hole

• From the explosion of a supernova

• From the collapse of a massive star

What is the primary source of energy for a quasar?

• Nuclear fusion

• Gravitational energy from accretion

• Chemical reactions

• Magnetic fields

What is a characteristic feature of a quasar's emission spectrum?

• Continuous spectrum

• Broad emission lines

• Absorption lines

• Narrow emission lines

What does the redshift of a quasar indicate?

• The quasar is moving towards us

• The quasar is moving away from us

• The quasar is stationary

• The quasar is rotating

Which equation is used to calculate the redshift of a quasar?

What does a high redshift value for a quasar suggest about its distance?

• It is very close

• It is very far away

• It is at a moderate distance

• It is within our galaxy

How is the luminosity of a quasar typically measured?

• In watts

• In solar luminosities

• In joules

• In kilowatts

What is the typical luminosity range of a quasar?

What causes the variability in quasar brightness?

• Changes in the quasar's magnetic field

• Variations in the accretion rate

• Changes in the quasar's size

• Variations in the quasar's temperature