Do photons have inertia?

I couldn't find a clear answer to this question, so please enlighten me. My understanding right now is it does not.

 

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They have no inertia, because they are massless. They do have momentum, a measure of energy, which is independent of mass.

 

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@AlexG

Mass is a form of energy, just saying.​

 

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No.

Mass is equivalent to energy, but that's not saying they're the same thing.

 

@AlexG

I'll say it clearer for you then mass is a form of energy there are other forms energy such as electromagnetic radiation but electromagnetic radiation and mass are NOT the same thing, they are all classed under energy.​

 

Then let me say it clearer to you.

You're wrong.

Mass and energy are not the same things, thay are not all classed under energy. There is an equivalence of mass and energy, but they're not the same things.

Is that clear enough?

 

@AlexG

I of course disagree with your comment according to mainstream understanding. Equivalence of mass-energy is just a technical phrase it's really equivalence of electromagnetic radiation-mass.​

 

And I, of course, continue to disagree with yours.

 

@AlexG

Your disagreement is backed by what?​

 

Mass and energy are not the same thing.

\( E \not= M\)

There is an equivilancy:

\( E = Mc^2\)

Force:

\( F = ma\)

\( F\not=Ea\)

 

@origin

Note the equivalency in the famous equation is between electromagnetic radiation (not energy) and mass in actuality.​

 

@James R

All I'm saying is that E which represents energy in physics is electromagnetic radiation and that in actuality both electromagnetic radiation and mass are forms of energy.​

 

@James R

Agreed and also mass is one of those forms but is distinguished from the other forms by the symbol E.​

 

Nope. It's already been pointed out that there are other forms of energy besides em, and mass is not a form of energy.

You seem to think that 'equivalence' means 'the same thing as".

 

@AlexG

It's your assertion against my logical claim and fyi I don't think *equivalence* means the same thing as.​

 

Ah, logic.

Science works better.

Try it sometime.

 

@AlexG

Excellent, deny all logic and rationality that scientific method is founded on as well as sidetrack from what was being discussed.​

 

Photons don't have inertia but they do have momentum.