Physics 9702 · AS & A Level · Interference

Interference — practice question

Visible interference fringes are formed with light passing through a double slit. At first, the light coming out of each slit has the same intensity. The intensity of the light coming out of one slit is then decreased. How does this affect the interference pattern?

  • AThe bright fringes and the dark fringes all become brighter.
  • BThe bright fringes and the dark fringes all become darker.
  • CThe bright fringes become brighter and the dark fringes become darker.
  • DThe bright fringes become darker and the dark fringes become brighter.

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