Exam-style question
Try this first
Why are certain particle interactions deemed impossible?.
- A.They require more energy than available.
- B.They do not conserve charge.
- C.They involve particles that do not exist.
- D.They are not predicted by the Standard Model.
Model answer
What a good answer should say
- They do not conserve charge.
Explanation
Why this works
The cause is the failure to conserve charge in the proposed interaction. The mechanism is that charge conservation is a fundamental requirement in all particle interactions.
The effect is that if charge is not conserved, the interaction cannot take place, leading to the consequence that such interactions are ruled out by the principles of physics.
Common mistake
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