Skip to main content
Donate

Up Next

Can you call a cell phone in the microwave?

Can you call a cell phone in the microwave?

Season 1 Episode 20
7:05
How does laser cooling work?

How does laser cooling work?

Season 1 Episode 21
5:27
Could you replace your eye with a camera?

Could you replace your eye with a camera?

Season 1 Episode 22
5:37
How science explains monster waves

How science explains monster waves

Season 1 Episode 23
5:49
Bizarre spinning toys

Bizarre spinning toys

Season 1 Episode 24
4:56
How SMOOTHNESS of a SOCCER BALL affects curve

How SMOOTHNESS of a SOCCER BALL affects curve

Season 1 Episode 25
5:44
World's Easiest DIY Electric Train

World's Easiest DIY Electric Train

Season 1 Episode 26
5:44
Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson

Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson

Season 1 Episode 27
7:55
Should you go to Mars? ft Bill Nye

Should you go to Mars? ft Bill Nye

Season 1 Episode 28
9:04
How to shrink a quarter with electricity

How to shrink a quarter with electricity

Season 1 Episode 29
7:48
Can you solve this pier puzzle?

Can you solve this pier puzzle?

Season 1 Episode 30
4:58
What are antibubbles?

What are antibubbles?

Season 1 Episode 31
6:11
Back to Show
Physics Girl

Is energy always conserved?

Season 1 Episode 19

When light passes through the universe and is redshifted by the expansion of space itself, how is energy conserved? The stretched light has a longer wavelength and therefore a lower energy. Is energy conserved? If so, where does it go?
Stream on your TV
Support Provided By
Experiments with $100,000+ Speakers
6:37
Season 4 Episode 5
Experiments with $100,000+ Speakers
Experiments with $100,000+ Speakers
AMAZING underwater vortex rings!
5:48
Season 4 Episode 4
AMAZING underwater vortex rings!
DIY Science - Make a colored vortex ring in the pool
Singing this note is IMPOSSIBLE!
6:27
Season 4 Episode 3
Singing this note is IMPOSSIBLE!
Try to sing up the scale of notes into a pipe, certain notes are impossible to sing!
How Magnet Paper Works ft. MKBHD
6:56
Season 4 Episode 2
How Magnet Paper Works ft. MKBHD
Magnet paper or magnet film shows you were magnetic fields are.
Stephen Hawking's Final Theory on Black Holes
6:57
Season 4 Episode 1
Stephen Hawking's Final Theory on Black Holes
The black hole information paradox and Soft Hair
How to make a square vortex ring!
7:24
Season 3 Episode 28
How to make a square vortex ring!
Dianna from Physics Girl makes DIY crazy vortex ring shapes.
How to make fluid "climb" up! AMAZING SLIME EXPERIMENT!
4:57
Season 3 Episode 27
How to make fluid "climb" up! AMAZING SLIME EXPERIMENT!
Exploring how Slime is made through science
We turned this truck into a GIANT CAMERA!
7:09
Season 3 Episode 26
We turned this truck into a GIANT CAMERA!
We made a pinhole camera in the back of a Uhaul!
What Size Magnet Can Erase a Credit Card?
9:46
Season 3 Episode 25
What Size Magnet Can Erase a Credit Card?
Don’t try this at home! We did it for you – and for science!
The Broom Riddle (Solution) ft. Kurt Hugo Schneider
6:12
Season 3 Episode 24
The Broom Riddle (Solution) ft. Kurt Hugo Schneider
Three tricky riddles! See if you can solve the 2s riddle!
Bowl Riddle Solution ft. Kurt Hugo Schneider
5:19
Season 3 Episode 23
Bowl Riddle Solution ft. Kurt Hugo Schneider
Can you solve the next two riddles? (1) the silent round riddle (2) the broom riddle
Can you solve the bowl riddle? ft. Kurt Hugo Schneider
6:12
Season 3 Episode 22
Can you solve the bowl riddle? ft. Kurt Hugo Schneider
See if you can solve (1) the bucket riddle (2) the clock puzzle (3) the bowl riddle!
Show more
Active loading indicator