DP Physics (first assessment 2025)
Question 23M.2.SL.TZ2.3c
| Date | May 2023 | Marks available | [Maximum mark: 3] | Reference code | 23M.2.SL.TZ2.3c |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Predict | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 3]
23M.2.SL.TZ2.3c
(c)
The student changes the light source to one that emits two colours:
• blue light of wavelength , and
• red light of wavelength 1.5.
Predict the pattern that the student will see on the screen.
[3]
Markscheme
Blue fringe is unchanged ✓
Red fringes are farther apart than blue ✓
By a factor of 1.5 ✓
At some point/s the fringes coincide/are purple ✓
