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CAIE A-Level Physics 8.4.2 Measuring Wavelength with a Grating

Practise explaining how a diffraction grating determines monochromatic-light wavelength, identifying measurements, arrangement and repeated-order observations.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • describe how a diffraction grating can be used to determine the wavelength of light
  • identify the measurements, arrangement and repeated-order observations needed for the wavelength calculation

8.4.2—The use of a diffraction grating to determine the wavelength of light question 1

[Maximum number: 1]

Which property of a light wave can be determined using a diffraction grating?

A

amplitude

B

intensity

C

speed

D

wavelength

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