James Fodor

speaker

3,084 appearances 4 recordings 1 series first heard Jun 2026 last heard 30 Aug

James Fodor’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 4 in all, peaking in Aug 2026 with 2.

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The Science of Everything Podcast · Episode 163: The Standard Model of Particle Physics · 8 Aug 2026 podcast

So this includes uh electrons, for example, uh, but also quarks, which are the constituent particles that make up protons and neutrons.

We'll talk more about those in a minute.

Uh so those have uh positive and and negative charges as well.

So anything that has a ch electrical charge interacts with is affected by the electromagnetic force.

The electromagnetic force is mediated by a particle called the photon, which you'd be familiar with.

It it forms the electromagnetic force allows for or facilitates the formation of bound states, which are sort of like stable states where the the particles stay in a uh consistent relationship with each other over time, a sort of a like a local low energy state, such as atoms and molecules.

So those are obviously important for um most of the rest of the

chemistry of the periodic table and and so forth, th those bound states.

So electromagnet electromagnetism is a very important force.

Electromagnetism has an infinite range, and so even very distant charged objects will feel at attractive or repulsive forces f from other charged objects.

Let's then move to the strong nuclear force.

So the strong nuclear force affects particles that have what's called color charge.

This is an important concept to get clear.

So just as we have electromagnetic charge for, say, electrons or protons and the quarks that make them up, quarks also have another type of charge or another quantum number, if you prefer to phrase it that way, which is called color charge.

So anything that has a color charge uh feels the effects of the strong nuclear force.

Unlike the electric charge, which only has positive and negative versions, so there's like two versions of the electric charge.

Color charge has three variants.

The colors are called red, green, and blue, and then there's also

a corresponding anti-color version, anti red, anti-green, and anti-blue.

So in some sense there's there's uh six different colours, charges consisting of uh one colour and then it's anti colour, just like we have sort of positive and negative charge in electromagnetism.

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