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

the temperature rise in a material.

Cerenkov radiation.

energetic charged particles.

radioactive particles.

3. Wave particle-duality relates to

all of the above.

visible radiation.

infra-red radiation.

UV radiation.

4. The International Ultraviolet Explorer (IUE) experiment

is currently being built.

is not a space mission.

is currently in orbit.

has since finished operation.

5. Scintillation detectors can be made from

aluminium.

wood.

stainless steel.

water.

6. The typical wavelength of an X-ray photon is

600 nm.

0.1 nm.

50 nm.

1.5 µm.

7. A light wave with large amplitude has a

long wavelength.

high frequency.

low brightness.

high brightness.

8. Radio telescopes

require a very smooth surface.

do not require a very smooth surface.

operate only at night.

need to be cooled.

9. The ISO satellite is sensitive to

X-rays.

IR.

Gamma rays.

UV.

10. A Newtonian telescope utilises a

lens.

flat secondary mirror.

corrector plate.

curved secondary mirror.