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