Exam Revision

What is the wavelength of a 90.5 MHz radio wave?

• 3.31 m
• 2.50 m
• 1.65 m
• 0.75 m

Which star is closer to Earth based on parallax angle?

• Star A: 0.4 arcsec
• Star B: 0.25 arcsec
• Both are equal
• Cannot be determined

Which star is brighter in absolute magnitude?

• Arcturus (M = -0.3)
• Pollux (M = +1.08)
• Both are equal
• Cannot be determined

Which star appears brightest from Earth?

• Rigel (0.12)
• Betelgeuse (0.5)
• Aldebaran (-0.2)
• All are equally bright

What force holds nucleons together?

• Gravitational force
• Strong nuclear force
• Electrostatic force
• Magnetic force

Radiation penetrates 2 mm of lead. What type is it?

• Alpha
• Beta
• Gamma
• Neutron

A star has absolute magnitude +12 and is cool. What type is it?

• White dwarf
• Red giant
• Blue supergiant
• Main sequence

Which is NOT evidence for the Big Bang?

• Cosmic microwave background radiation

• Redshift of galaxies
• Gravitational lensing
• Hubble's law

Which stage in a massive star leads to a black hole?

• Main sequence
• Supernova
• Neutron star
• Core collapse

Speed of light in glass (n=1.5) if c=3x10^8 m/s?

• 2.0 x 10^8 m/s
• 1.5 x 10^8 m/s
• 3.0 x 10^8 m/s
• 1.0 x 10^8 m/s