Assignment 7 - Topic 26& 27

1. A spaceship leaves our solar system at a constant speed of 0.900c and travels to a point in the Andromeda galaxy. According to astronomers in an inertial reference frame on Earth, the distance to the galaxy is 2.081 1022 m. What distance does the crew on the ship measure on its journey?

2. Describe what happens inside an atom in order for electrons to change orbits.

3. What does the Pauli Exclusion Principle say?

4. How does the photoelectric effect relate to ionization energy?

5. What does Heisenberg's Uncertainty Principle state, and how would you explain it to someone not in this class?

6. What does the de Broglie wavelength mean? 7. What does Blackbody radiation tell us about the relationship between light and temperature?