| 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 is diffracted after passing through a very narrow single slit of width . The intensity of the central maximum of the diffracted light is . 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...
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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
A. 0.01
B. 0.02
C. 1
D. 2
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21M.1.HL.TZ2.29:
Monochromatic light of wavelength passes through a single-slit of width and produces a diffraction pattern on a screen. Which combination of changes to and will cause the greatest decrease in the width of the central maximum?
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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...
