Does light, theoretically, have any mass?

[Swat 3]

If lights are made a photons, theoretically they have mass, right?

If it doesn't, how does light have momentum?

[Ad Bot]

[Niff]

there's a vsauce about this somewhere

[Night Fox]

I think it's old news that light has mass? I'm pretty sure it does, anyway

[F3d323]

there's a vsauce about this somewhere

minute*thing*

Or maybe it was vsauce


On topic, I think it does.

[Gojira]

yes it does
very little though
all of the sunlight hitting earth at any given point is about as massive as a cruise ship

[Ipquarx]

Light has no mass, photons have no mass. They have ENERGY. Gravity acts on ENERGY, which is something both matter and light have, so both are affected. (feel free to prove me wrong this is just what i remember from a documentary i saw a while ago)

[Night Fox]

Light has no mass, photons have no mass. They have ENERGY. Gravity acts on ENERGY, which is something both matter and light have, so both are affected.

buuut light does have momentum and that's how solar sails work, so mass is certainly necessary

[Swat 3]

But photons basically take up a little tiny bit of space, so they must have mass.

:c

[cooldawson3]

Vsauce, "The weight of shadows," or something like that touches on this a bit.

[Blockguy345]

everything has mass, except light has very little mass

[Renekar]

enhance

enhance

enhance

[ABlockOfCheese]

It exists right? so it has mass.

You actually weigh more in a lit room than you do a dark one.

[Jubel]

its mass is pretty much negligible

[Alkatjo]

It does, but it doesn't.
Complicated to explain. Just like Dark matter. Its there but we don't know what it is.

[Night Fox]

You actually weigh more in a lit room than you do a dark one.

gotta turn off the lights before weighing myself. every bit counts