Physics 9702 · AS & A Level · Interference

Interference — practice question

Interference fringes with spacing $x$ are seen on a screen placed $1.00\,\text{m}$ from a double slit illuminated by yellow light with wavelength $600\,\text{nm}$. At what distance from the double slit would fringes with the same spacing $x$ be produced if blue light of wavelength $400\,\text{nm}$ were used?

  • A$0.33\,\text{m}$
  • B$0.67\,\text{m}$
  • C$0.75\,\text{m}$
  • D$1.50\,\text{m}$

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