TED-Ed: Is time travel possible? - Colin Stuart

The video explores the concept of time travel, highlighting Sergei Krikalev's experience as a cosmonaut who time-traveled into his future due to time dilation. It delves into the historical experiments by Michelson and Morley, leading to Einstein's theory of special relativity. The video explains time dilation through a thought experiment with Jack and Jill, and discusses real-world tests using atomic clocks on planes. It also examines the impact of time dilation on GPS technology and speculates on the future possibilities of time travel, emphasizing the energy challenges involved.

Who is considered the greatest time traveler in human history due to time dilation effects?

• Albert Einstein

• Sergei Krikalev

• Neil Armstrong

• Yuri Gagarin

What was the unexpected result of the Michelson-Morley experiment?

• The speed of light varied with Earth's motion

• The speed of light remained constant

• Light traveled faster in the direction of Earth's movement

• Light traveled slower against Earth's movement

What theory did Albert Einstein develop that relates to time travel?

• General Relativity

• Quantum Mechanics

• Special Relativity

• Newtonian Physics

In the thought experiment, what does Jill observe about the ball Jack is bouncing on the train?

• The ball moves in a circular path

• The ball follows a triangular path

• The ball moves in a straight line

• The ball does not move

What was the result of the atomic clock experiment conducted on a plane?

• The clocks showed the same time

• The clocks on the plane showed a different time

• The clocks on the ground stopped working

• The clocks on the plane were faster

How does time dilation affect GPS satellites?

• It has no effect

• It causes their clocks to disagree with ground clocks

• It makes them faster

• It causes them to lose signal

What is a major challenge in achieving time travel to the distant future?

• Lack of interest

• Insufficient energy to reach near-light speeds

• Lack of scientific understanding

• Inability to build spacecraft