Name: Is energy always conserved?
Uploaded: 2023-05-15T11:55:24+00:00
Duration: 6 min 3 s
Description: 280816 Like and subscribe. This is an archive, check the link in the end if you are owner. This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl When light passes throu

1 year ago

Dianna Cowern Physics Science Nuclear Matter Phase Quantum Chemistry Energy Hydrogen Volcano

280816 Like and subscribe. This is an archive, check the link in the end if you are owner. This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl

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?

Many thanks to Sean Carroll for his wonderful description of this question: http://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/

More resources:
http://motls.blogspot.com/2010/08/why-and-how-energy-is-not-conserved-in.html
http://hyperphysics.phy-astr.gsu.edu/hbase/astro/hubble.html

Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2

http://physicsgirl.org/
‪http://twitter.com/thephysicsgirl
‪http://facebook.com/thephysicsgirl
‪http://instagram.com/thephysicsgirl
http://physicsgirl.org/

Creator: Dianna Cowern
Editor: sefd.com , Jabril Ashe
Writer: Sophia Chen

Gravitational Wave Animations: LIGO

Visuals: Pixabay.com
Music: APM and YouTube
https://rumblevideoarchive.wordpress.com/

Loading comments...