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