Why Doesn't Light Have Mass?

Of all the things we can actually see (directly), we say light is the only one that doesn't have mass. Is this true? How is this possible if it has energy?
________________________________
VIDEO ANNOTATIONS

Why do the Planets orbit in a Plane?

What is Inertia?

Relativity & Gravity Complete Series:

Bonds Do NOT Have Energy!

Mass? Energy? What's The Difference?

The "Vacuum" of Space:

Recent Vlog:
________________________________
HUGE THANK YOU TO THESE PATRONS:

** Randy Hukle **
________________________________
SCIENCE ASYLUM STUFF

Support us on Patreon:

Advanced Theoretical Physics (eBook):

Merchandise:

More videos at:

________________________________
EXTRA INFO LINKS

Related Veritasium Video:

Related MinutePhysics Video:

SciShow Space Video on Kugelblitz:

Hydrogen Fusion:

Particles:

Solar Luminosity:

Mass Energy Equivalence:

________________________________
COMMENTS ABOUT LIGHT

ashley hughes:

A. Shafey & Nga Nguyen:

Chock Thirtytwo:

Commisar Aecun:

Ira Sanborn:

JustAditya:

Required Taste:

sudharsan vj:

________________________________
COMMENT RESPONSES

Scaling - Jesse LaJeunesse:

Sun's Magnetic Field - nunya bisnass:

Gravity from Where? - Amy Soderstrom:

Other Star Systems - K8UR Channel:

________________________________
IMAGE CREDITS

Logo designed by: Ben Sharef

Stock Photos and Clipart
- or I made them myself...

[ScienceAsylum]

Also, here are some other follow-up videos because this video was a mess:

[Joe-ijnw]

"The more massive something is the less willing it is to change how it's moving."

This explains why it gets harder and harder to workout out.

[psychachu]

Currently blitzing through “light has no mass” videos; determined to get this in my head today. This was a good one, cheers.

[germaindrouet]

Nick Lucid, You have an incredible talent to make science easy, fun and interesting. Thank you and keep them coming!!

[musicreviewification]

how can this channel not have 100, 000+ subs? The work you put in is nuts!

[ailblentyn]

This is how I think of it, based on what I've read and learnt: mass is energy in a box. A photon doesn't have mass, but if you put it in a mirrored box where it bounces around endlessly, then the photon adds to the mass of the set-up...

[hatoftricks]

3:09 These twins create some good content! His brother asks the questions and the other brother answers them! Genius!!!

[hellzs]

I want you to know that you are amazing. In less than 5 minuets, you did a better job at explaining why light has no mass than 4 of my professors and 2 high school science teachers ever did.

[Curas]

I learned one very important thing from this video
I need to go back to class!
Lol!

[Arkalius]

This channel is fantastic and needs more exposure. You have such a fantastic style of teaching.

[alienufoweird]

This channel is freaking amazing, this video alone made my conception of mass do a 360° turn. Keep doing what you do and thank you for your great work.

[MaxDooDat]

"It's OK to be a little crazy".  I'm glad he mentioned that, because up to that point I was getting a bit worried.

[LandNfan]

Light has no mass because it isn't Catholic.

[fluffigverbimmelt]

"Light is the exhaust of the sun"
Pure gold. I'll go outside, soak in some exhaust stuff and feel healthy

[HO.Science]

Great channel! Funny and informative. However, I have a correction. At 2:53 you bring up the Crookes Radiometer and imply it rotates because of the momentum of light. This is not the case. You said you "removed the air to avoid any complicated thermodynamics, " but thermodynamics is exactly what causes it to spin. There's a small amount of molecules left within the bulb (it's only a partial vacuum) which allows differential heating from the black and white sides to have maximum effect and spin the "blades". The loss of momentum of the light is an unimaginably incredibly small contribution to the rotation. There's a reason solar sails have to be so large and light (excuse the pun). I love your channel and hope it grows!

[omkarbansode]

You literally make science as fun as never before 😀😁

[JasonMasters]

A Higgs Bosun walks into a church.
The priest says "you don't belong here; you're not a person."
The Higgs Bosun replies, "without me, you can't have mass."
The priest looks thoughtful and says "the gravity of your argument adds weight to it." ;)

[PashwaOfficial]

It will take me more watches to comprehend this

[Jimifan]

When I was in the Navy many years ago, I was placed into the Nuclear Propulsion Engineering Program, which was in Orlando back then. We were taught that a photon had "instantaneous" mass, which I never really understood.

[jayzlungub]

Why does light doesnt have mass?
Because it doesnt matter 😂