Relativity

Front

What is an inertial frame of reference?

Back

An inertial frame of reference is a frame of reference in which an object either remains at rest or moves at a constant velocity unless acted upon by a force.

Front

True or False: A train slowing down as it climbs a hill is an example of an inertial frame of reference.

Back

False

Front

What happens when two clocks, one stationary and one traveling close to the speed of light, are compared after the traveling clock returns?

Back

More time elapsed on the stationary clock.

Front

How many postulates are there in the special theory of relativity?

Back

2

Front

What is the approximate speed of light (c)?

Back

3 x 10^8 m/s.

Front

Who derived the special theory of relativity?

Back

Einstein.

Front

What is time dilation?

Back

Time dilation is the difference in the elapsed time measured by two observers, due to a relative difference in velocity between them.

Front

What is length contraction?

Back

Length contraction is the phenomenon where an object in motion is measured to be shorter in the direction of motion relative to a stationary observer.

Front

What is the principle of relativity?

Back

The principle of relativity states that the laws of physics are the same in all inertial frames of reference.

Front

What is the significance of the speed of light in relativity?

Back

The speed of light is the maximum speed at which information or matter can travel, and it is constant in all inertial frames of reference.