Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.3.2.1 · Waves · Refraction, diffraction and interference
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3.3.2.1 Interference
| Content | Opportunities for skills development |
|---|---|
Path difference. Coherence. Interference and diffraction using a laser as a source of monochromatic light. Young’s double-slit experiment: the use of two coherent sources or the use of a single source with double slits to produce an interference pattern. Fringe spacing, |
Production of interference pattern using white light.
Students are expected to show awareness of safety issues associated with using lasers.
Students will not be required to describe how a laser works.
Students will be expected to describe and explain interference produced with sound and electromagnetic waves.
Appreciation of how knowledge and understanding of nature of electromagnetic radiation has changed over time.
AT i Investigation of two-source interference with sound, light and microwave radiation. |
Required practical 2: Investigation of interference effects to include the Young’s slit experiment and interference by a diffraction grating. |