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