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1)Draw the ray diagram for a Cassegrain telescope and label theparts of the telescope. [2 marks]
2)This table shows some of the properties in the constellation
Hercules.
Star Distance/parsec Spectral class Apparent
magnitude
Kornephoros 43 G 2.8
Rasalgethi 110 M 3.0
Ruticulus 11 G 2.8
Sarin 23 A 3.1
2.1) Define parsec. [2 marks]
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, 2.2)Which star from the two would appear the largest, Kornephoros
or Rutilicus. Explain why. [3 marks]
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2.3)Calculate the absolute magnitude of Sarin [3 marks]
Absolute magnitude=_____________
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