The strong interaction couples to a property called color, just as the electroma

Question

The strong interaction couples to a property called color, just as the electromagnetic interaction couples to charge. There are three colors, R, G and B. There are also three anticolors, Y (anti-blue), M (anti-green) and C (anti-red). Quarks come in colors, while gluons, the bosons of the strong interaction, carry a color and an anticolor. Suppose a G quark emits a G-C gluon. What happens to the color of the quark?

1. It becomes M.

2. It becomes C.

3. It becomes Y.

4. It becomes B.

5. It becomes R.

6. It stays G

Explanation / Answer

When a green quark (G) emits a green-cyan (G-C) gluon, its green color is lost and it turns to red color (anti-cyan). Therefore option 5 is the answer.

To get an idea, I will give one more example. If the green quark emits a green-yellow (G-Y) gluon it will lose its green color and becomes a blue quark (anti-yellow).

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