C.3.13 (HL)—Diffraction envelope Topic Practice
C.3.13 (HL)—Diffraction envelope Topic Practice
Practise interpreting double-slit patterns shaped by a single-slit envelope, including missing maxima and changing fringe intensity.
How this is tested
- read an intensity-angle graph to separate narrow fringe spacing λ/d from the wider envelope scale λ/b
- explain a missing bright fringe when a double-slit maximum coincides with a single-slit minimum
- use the envelope on the graph to justify why maxima at different positions have different intensities