Physics 9702 · AS & A Level · Interference

Interference — practice question

Monochromatic light with wavelength $450\,\text{nm}$ is passed through two parallel slits that are $0.30\,\text{mm}$ apart. A screen is positioned $2.0\,\text{m}$ away, where bright fringes are formed. What is the spacing between the bright fringes on the screen?

  • A$1.3\,\text{mm}$
  • B$1.5\,\text{mm}$
  • C$3.0\,\text{mm}$
  • D$6.0\,\text{mm}$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI