Physics 9702 · AS & A Level · Interference

Interference — practice question

Monochromatic light is sent through two narrow slits, forming an interference pattern on a screen some distance away. The interference fringes are very closely spaced. Which change would increase the spacing between the fringes?

  • AIncrease the brightness of the light source.
  • BIncrease the distance between the slits and the screen.
  • CIncrease the distance between the two slits.
  • DIncrease the frequency of the light used.

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