DP Physics (last assessment 2024)
Question 22M.2.SL.TZ1.b
| Date | May 2022 | Marks available | [Maximum mark: 2] | Reference code | 22M.2.SL.TZ1.b |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Identify | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
22M.2.SL.TZ1.b
The Feynman diagram shows a possible decay of the K+ meson.
Identify the interactions that are involved at points A and B in this decay.
[2]
Markscheme
A «Decay of the strange antiquark is a» weak «interaction» ✓
B «Decay of the u to a gluon and eventually to d and anti-d is a» strong «interaction» ✓
Examiners report
Many candidates were able to successfully identify the two interactions in the diagram. Some candidates only described what was happening in the diagram without identifying the actual interaction. A common mistake was identifying the gluon at B as a graviton, and/or suggesting that this was a gravitational interaction. Many candidates also did not make the connection between the term "interaction" in the stem and the concept of force.
