1. According to special relativity, which of the following can move faster than light?
(a) Gravitational waves.
(b) Neutrinos.
(c) Nothing can move faster than light.
(d) Quantum data.

2. Einstein's equation, E=mc^2, states that which of the following are equivalent?
(a) Energy and mass.
(b) Electricity and magnetism.
(c) Light and magnetism.
(d) Energy and light.

3. Black holes are dense and massive cosmological bodies. What unique distinction do they have?
(a) Light cannot escape their gravitational well.
(b) They are the only objects that emit gamma rays.
(c) Neutrinos always flow towards them.
(d) They are the only types of stars that can produce uranium and heavier elements.

4. What are the components of an atomic nucleus?
(a) Photons and electrons.
(b) Protons and electrons.
(c) Protons and neutrons.
(d) Electrons and neutrons.

5. What would an outside observer notice about an object moving near the speed of light?
(a) It would not be observable under any circumstances.
(b) It would appear to move slower near a gravitational field.
(c) It would be shorted in the direction of its movement.
(d) It would appear vastly larger than it would at rest.

Short Answer Questions

1. If a clock were accelerated to nearly the speed of light for a year's time, which of the following would be true of its reading at the end of that time?

2. According to general relativity, all objects that have mass have what effect on space-time?

3. In Einstein's famous equation, E=mc^2, what does "c" represent?

4. What is the fundamental force responsible for keeping the nucleus of an atom "glued" together?

5. What type of a wave is light?

(see the answer key)

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