Special Relativity and the Twin Paradox

The video explores Einstein's theory of special relativity, focusing on its two postulates: the constancy of the speed of light and the uniformity of physical laws in inertial frames. It explains time dilation, where time ticks differently based on motion, and the twin paradox, where a traveling twin ages slower due to acceleration. The video also touches on general relativity, linking time dilation to gravitational fields, as depicted in the movie Interstellar.

What is one of the fundamental postulates of special relativity?

• The laws of physics are the same in all inertial frames.

• Gravity is the same everywhere in the universe.

• The speed of sound is constant for all observers.

• Energy can be created or destroyed.

What is the speed of light in a vacuum for all observers?

• 150,000 kilometers per second

• 450,000 kilometers per second

• 300,000 kilometers per second

• 600,000 kilometers per second

How does time dilation affect a moving clock compared to a stationary one?

• The stationary clock ticks slower.

• Both clocks tick at the same rate.

• The moving clock ticks slower.

• The moving clock ticks faster.

In the twin paradox, why does the traveling twin age less?

• Because she stays in an inertial frame.

• Because she travels at a constant speed.

• Because she travels in a straight line.

• Because she experiences acceleration.

What is the significance of acceleration in the twin paradox?

• It has no effect on the outcome.

• It allows the traveling twin to age more.

• It distinguishes between inertial and non-inertial frames.

• It makes the problem symmetric.

What happens to time in a gravitational field according to general relativity?

• Time remains unchanged in a gravitational field.

• Time stops in a gravitational field.

• Time runs slower in a gravitational field.

• Time runs faster in a gravitational field.

Which movie is mentioned as an example of time dilation in a gravitational field?

• Gravity

• Inception

• Interstellar

• The Martian