| Date | May 2022 | Marks available | 1 | Reference code | 22M.1.HL.TZ1.30 |
| Level | Higher level | Paper | Paper 1 | Time zone | 1 |
| Command term | Question number | 30 | Adapted from | N/A |
Question
Light of wavelength λ is diffracted after passing through a very narrow single slit of width x. The intensity of the central maximum of the diffracted light is I0. The slit width is doubled.
What is the intensity of central maximum and the angular position of the first minimum?
Markscheme
B
Examiners report
Option B was the most frequent (correct) selected by candidates. Interestingly, the more able candidates were distracted by option D, who were likely considering the intensity/amplitude relationship. As a result, this would be a good MC question for teaching purposes.
Syllabus sections
- 19N.1.HL.TZ0.27: Light of frequency 500 THz is incident on a single slit and forms a diffraction pattern. The...
- 21N.1.HL.TZ0.27: When monochromatic light is incident on a single slit a diffraction pattern forms on a...
- 19N.2.HL.TZ0.10c(i): Draw, on the axes, the variation with diffraction angle of the intensity of light incident on...
-
17N.2.HL.TZ0.6a.iii:
Calculate the separation of the two slits.
-
21M.1.HL.TZ1.27:
The diagram shows the diffraction pattern for light passing through a single slit.
What is
wavelength of lightwidth of slit
A. 0.01
B. 0.02
C. 1
D. 2
-
21M.1.HL.TZ2.29:
Monochromatic light of wavelength λ passes through a single-slit of width b and produces a diffraction pattern on a screen. Which combination of changes to b and λ will cause the greatest decrease in the width of the central maximum?
-
19M.2.HL.TZ2.8cii:
Show that, due to single slit diffraction, the intensity at a point on the screen a distance of 28 mm from M is zero.
- 18M.1.HL.TZ2.25: A beam of monochromatic light is incident on a single slit and a diffraction pattern forms...
