| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.HL.TZ1.18 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 18 | Adapted from | N/A |
Question
A parallel beam of monochromatic light of wavelength \(\lambda \) passes through a slit of width \(b\). After passing through the slit the light is incident on a distant screen. The angular width of the central maximum is
A. \({\text{2}}\frac{\lambda }{b}\) radians.
B. \(\frac{\lambda }{b}\) radians.
C. \(2\frac{\lambda }{b}\) degrees.
D. \(\frac{\lambda }{b}\) degrees.
Markscheme
A
Examiners report
[N/A]
