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Can you push a spacecraft with light?

Can you push a spacecraft with light?

Season 1 Episode 14
4:35
The Black Hole Death Problem

The Black Hole Death Problem

Season 1 Episode 15
4:48
Five Weird Ways to Put Out a Candle

Five Weird Ways to Put Out a Candle

Season 1 Episode 16
5:04
Quantum Cryptography Explained

Quantum Cryptography Explained

Season 1 Episode 18
7:47
Is energy always conserved?

Is energy always conserved?

Season 1 Episode 19
5:16
How does laser cooling work?

How does laser cooling work?

Season 1 Episode 21
5:27
How science explains monster waves

How science explains monster waves

Season 1 Episode 23
5:49
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Physics Girl

Are perpetual motion machines possible?

Season 1 Episode 11

A wheel that spins forever; a bird that never quenches its thirst; a clock that never stops ticking, an endless source of free energy. These are but the dreams of inventors striving to make perpetual motion machines, machines that can work forever without any energy input. Are these machines possible without violating the laws of physics? No.