Spacetime

Mr. Andersen explains the concept of spacetime, combining space and time, as introduced by Einstein's theory of relativity. He discusses how gravity and velocity affect spacetime, leading to phenomena like time dilation. Examples include astronauts experiencing slower time on the International Space Station and the need for GPS satellites to adjust for time dilation. The video concludes with the idea that space and time are not absolute but relative, especially at high speeds or strong gravitational fields.

Explain how gravity can affect time according to the principles of relativity.

Describe the effects of approaching the speed of light on the dimensions of objects in motion.