BRAINCAKEInvestigating Diffraction with a Laser
A laser and a diffraction grating can be used to measure the wavelength of laser light accurately.
Apparatus: a laser, a diffraction grating of known lines per mm in a holder, and a screen (or wall) about 1 m away. The distance D from the grating to the screen is measured with a metre rule or tape.
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Key terms in this lesson
- diffraction grating
- An optical component with a very large number of closely and equally spaced parallel slits, used to produce sharp interference maxima.
More in Waves
- Speed and Frequency of Waves on a Stretched String
- Investigating the Factors Affecting Fundamental Frequency
- Fundamental Frequency
- Diffraction
- Factors Affecting Diffraction
- Single Slit Diffraction
- The Diffraction Grating
- Two Slit Interference
All 22 lessons in Waves · All Edexcel AS-level Physics topics