Exploring the Cosmos - Degree Exam 2008 - Mapping the Universe
1. A Cassegrain telescope
is not a widely used optical design.
has a wide field of view.
has a short focal length.
is a common optical design used at modern observatories.
2. Infra red detectors can work by measuring
energetic charged particles.
Cerenkov radiation.
the temperature rise in a material.
radioactive particles.
3. Wave particle-duality relates to
UV radiation.
all of the above.
infra-red radiation.
visible radiation.
4. The International Ultraviolet Explorer (IUE) experiment
is not a space mission.
is currently in orbit.
has since finished operation.
is currently being built.
5. Scintillation detectors can be made from
stainless steel.
wood.
water.
aluminium.
6. The typical wavelength of an X-ray photon is
50 nm.
0.1 nm.
1.5 µm.
600 nm.
7. A light wave with large amplitude has a
high frequency.
long wavelength.
low brightness.
high brightness.
8. Radio telescopes
need to be cooled.
operate only at night.
require a very smooth surface.
do not require a very smooth surface.
9. The ISO satellite is sensitive to
UV.
IR.
X-rays.
Gamma rays.
10. A Newtonian telescope utilises a
flat secondary mirror.
corrector plate.
lens.
curved secondary mirror.
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