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Waves

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Question 1

A student is tasked with calibrating a new adjustable semiconductor laser diode to determine its emission wavelength, λ\lambdaλ, and optical frequency, fff. The student has access to a high-precision calibration diffraction grating marked with a known line density of NlineN_{\text{line}}Nline​ lines per millimetre.

Describe an experimental procedure to determine λ\lambdaλ and fff using this apparatus.

In your description, you must explain:

  • the experimental setup and the specific measurements that must be recorded,
  • how to use a graphical method to analyse the collected data to determine both λ\lambdaλ and fff (including all relevant equations),
  • two practical steps to reduce the experimental uncertainty of your measurements.
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Markscheme

Waves Questions

  1. A Level
  2. /Physics
  3. /Waves

26 exam-style questions on OCR A A Level Physics Waves, covering Wave motion, Electromagnetic waves, Superposition, and Stationary waves. Each one has a worked solution and a mark scheme showing where the marks go.

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