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6 marksProperties of Waves

CAPE Physics Unit 1 · 1999 · Paper 2 · Question 7(b)

Describe, with the aid of a diagram, an experiment to measure the wavelength of yellow light from a straight filament bulb, using a diffraction grating having N lines per metre.

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Other parts of this question

  1. 7(a)Explain the phenomena involved in the formation of a diffraction pattern by a plane diffraction grating.[2 marks]
  2. 7(c)(i)Find the angular breadth of the first-order spectrum. Show your result on a labelled diagram.[12 marks]
  3. 7(c)(ii)Show that the second-order spectrum of the white light overlaps with the third-order spectrum.[1 mark]

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