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4 marksProperties of Waves

CAPE Physics Unit 1 · 2017 · Paper 2 · Question 2(b)

With the aid of an appropriate diagram, show that for Young's double slit experiment, y = λ D/a, where λ is the wavelength of the source, a is the slit separation, D is the distance between the slits and the screen, and y is the separation between the central bright fringe and the first order fringe.

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Other parts of this question

  1. 2(a)With the aid of a labelled diagram, describe how the pieces of apparatus shown in Figure 3 can be used to disprove the theory of the particulate nature of…[6 marks]
  2. 2(c)(i)Calculate the wavelength of the monochromatic light used in this experiment.[3 marks]
  3. 2(c)(ii)On a suitable sketch, indicate the intensity variation of the fringes from the central maximum to the fourth bright fringe.[2 marks]

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