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Quasars
Question Paper
Level
A LEVEL
Subject
Physics
Exam Board
AQA
Topic
3.9 Astrophysics
Sub-Topic
Cosmology – Quasars
Booklet
Question Paper
Time Allowed:
5
minutes
Score:
/5
Percentage:
/100
Grade Boundaries:
Page 1
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Q1.
Cygnus A may be the nearest quasar yet discovered.
(a)
Cygnus A has a redshift, z, of 0.057.
Calculate the distance to Cygnus A. State an appropriate unit.
answer = ..................................................... unit = ............................
(4)
(b)
The first quasars were discovered in the 1950s. What property of quasars led to
their discovery?
........................................................................................................................
........................................................................................................................
(1)
(Total 5 marks)
Page 2