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Test Prep for AP® Courses
# Test Prep for AP® Courses

### 11.1 Einstein’s Postulates

1

Which of the following statements describes the Michelson-Morley experiment?

- The speed of light is independent of the motion of the source relative to the observer.
- The speed of light is different in different frames of reference.
- The speed of light changes with changes in the observer.
- The speed of light is dependent on the motion of the source.

### 11.4 Relativistic Addition of Velocities

2

What happens when velocities comparable to the speed of light are involved in an observation?

- Newton’s second law of motion, $F=ma$ , governs the motion of the object.
- Newton’s second law of motion, $F=ma$ , no longer governs the dynamics of the object.
- Such velocities cannot be determined mathematically.
- None of the above

3

How is the relativistic Doppler effect different from the classical Doppler effect?

### 11.6 Relativistic Energy

4

A mass of 50 g is completely converted into energy. What is the energy that will be obtained when such a conversion takes place?

5

Show that relativistic kinetic energy becomes the same as classical kinetic energy when $v=c$ .

6

The relativistic energy of a particle in terms of momentum is given by which of the following?

- $E=\sqrt{{p}^{2}{c}^{2}+{m}_{0}^{2}{c}^{4}}$
- $E=\sqrt{{p}^{2}{c}^{2}+{m}_{0}^{4}{c}^{4}}$
- $E=\sqrt{{p}^{2}{c}^{2}+{m}_{0}^{2}{c}^{2}}$
- $E=\sqrt{{p}^{2}{c}^{4}+{m}_{0}^{2}{c}^{2}}$