Physics 9702 · AS & A Level · Interference

Interference — practice question

A demonstration of double-slit interference is set up with light of wavelength $500\,\text{nm}$. The spacing between neighbouring bright fringes in the interference pattern is $5\,\text{mm}$. What could the values be for the distance from the slits to the screen, and for the slit separation?

  • Aslit-screen distance $50\,\text{cm}$, slit separation $0.5\,\text{mm}$
  • Bslit-screen distance $50\,\text{cm}$, slit separation $5\,\text{mm}$
  • Cslit-screen distance $5\,\text{m}$, slit separation $0.5\,\text{mm}$
  • Dslit-screen distance $5\,\text{m}$, slit separation $5\,\text{mm}$

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