Week 6, clip 9

Timepoint:  13:36.8

1) What is the essential idea of the Principle of Equivalence?

- Gravitational acceleration makes light redder.
- Gravitational acceleration acts the same as physical acceleration.
- Gravitational acceleration applies to all objects.
- Gravitational acceleration is everywhere in space.

Answers:
1) Gravitational acceleration acts the same as physical acceleration.