Physics 9702 · AS & A Level · Interference

Interference — practice question

A screen shows interference fringes formed by double-slit interference with light of wavelength $600\,\text{nm}$. The fringe spacing is $4.0\,\text{mm}$ and the slit separation is $0.60\,\text{mm}$. How far is the double slit from the screen?

  • A$0.25\,\text{m}$
  • B$0.40\,\text{m}$
  • C$2.5\,\text{m}$
  • D$4.0\,\text{m}$

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