Lecture 9(Last): The Special Theory of Relativity, Time travel Possibility

[00:00:00]Imagine [music] a 10-year-old child making this journey.

[00:00:03]The child travels through space at an extremely high speed while time passes normally on Earth.

[00:00:11]When the child [music] finally returns, only a few years have passed for the traveler, but many more years have passed [music] on Earth.

[00:00:20]Traveling into the future is allowed by Einstein's theory.

[00:00:23]But what about traveling into the past?

[00:00:27]Could we ever visit yesterday?

[00:00:30]Let us conclude this amazing series with a famous quotation.

[00:00:34]Once there was a Miss Bright who could travel faster than light.

[00:00:38]One day she went out in an Einsteinian way, but came back the previous night.

[00:00:47]>> [music] >> How is that possible?

[00:00:50]Relativity suggests that faster-than-light travel could create [music] paradoxes where effects appear before causes.

[00:00:58]And that is why the speed of light remains one of nature's most [music] important limits.

[00:01:08]Thank you for joining this journey [music] through Einstein's universe.

[00:01:12]Keep asking questions because curiosity is where discovery begins.