Worksheet: Concave Lenses

In this worksheet, we will practice defining a concave lens, describing the paths of light rays refracted through it, and explaining how rays are focused by such lenses.

Q1:

Which of the points A, B, C, and D shown in the diagram is closest to the focal point of the concave lens?

  • AD
  • BA
  • CC
  • DB

Q2:

At which of the points A, B, C, and D shown in the diagram is the angle of refraction greatest?

  • AA
  • BC
  • CD
  • DB

Q3:

Which of the following diagrams correctly shows the paths of light rays exiting a concave lens if the light rays enter the lens parallel to the axis of the lens?

  • AD
  • BC
  • CB
  • DA
  • EE

Q4:

Which of the objects shown is a concave lens?

  • A(E)
  • B(D)
  • C(C)
  • D(B)
  • E(A)

Q5:

Light rays converging to a point are incident on a concave lens, as shown in the diagram. Which of the other diagrams (A), (B), (C), (D), most correctly shows the directions of the rays that exit the lens?