you mean a photon XD

still kinda weird though

Yeah

I would say immaterial things influence the material world but are unseen in the same we cant see the entire electro magnetic spectrum

Through energy vibrating at different frequencies

Interacting with material vibrations

they influence each other

Like an ocean dense vibrations sink to the bottom

Kinda

The bottom of the ocean is more dense

Than the top

@Fran

??

even though the EM spectrum is "immaterial" (which its not because photons) , the notion of something immaterial effecting something material makes no sense. there is no interaction there

But the EM spectrum does that all the time

@inky he's using immaterial to simply mean 'zero mass' not something outside of physical relaity

Yep

i wouldnt say that photons are fully zero mass, while depending on how you approach it a photon could be considered zero mass if its at rest, but they never are, they have energy and momentum: which means they must have mass

@Gwen @Fran ^

Energy has no mass yk

And momentum is energy

relativity

?

total enrgy of the system/particle is equal to the mass of the particle/system times the speed of light squared

photons have zero mass

Exactly

only at rest

they are never at rest, independent of the reference point

When are they ever at rest?

exactly

cause they move at the speed of light (?!)

so zero mass

Yeah

all the time

they never are thats theoretical

@inky what

photons always move, the "photons have zero mass" is only when they theoretically are at rest

but at light speed, there is no reference frame where it dosent have the speed of light

sooooo... it never is at rest

soooo.... it never has mass

If an object can travel at the speed of light it has 0 mass