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Worksheet: Interference of Light Waves

Q1:

The two waves shown in the diagram have the same frequency and wavelength as each other, but with different initial displacements. If the two waves interfere, which of the other diagrams—(A), (B), (C), and (D)—best shows how the resultant wave compares to the two waves?

  • A(C)
  • B(A)
  • C(D)
  • D(B)

Q2:

The two waves shown in the diagram have the same frequency, wavelength, and initial displacement. If the two waves interfere, which of the other diagrams—(A), (B), (C), and (D)—best shows how the resultant wave compares to the two identical waves?

  • A(C)
  • B(B)
  • C(D)
  • D(A)