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3.2 Light

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Question 37

A student draws a diagram representing three rays of light from a point source Q Q\,Q passing through a converging lens. Each point labeled F F\,F is a principal focus of the lens.

The diagram shows:

  • Ray A: starts at QQQ, travels parallel to the principal axis to the lens, and refracts through the focus F F\,F on the right.
  • Ray B: starts at QQQ, travels towards the optical center of the lens, and refracts with a change in direction (bending) as it passes through the center.
  • Ray C: starts at QQQ, travels through the focus F F\,F on the left to the lens, and refracts parallel to the principal axis.

Which of the rays has the student drawn correctly?

A

ray A and ray B

B

ray A and ray C

C

ray B and ray C

D

ray C only

Markscheme

3.2 Light Questions

  1. IGCSE
  2. /Physics
  3. /3.2 Light

216 exam-style questions on CIE IGCSE Physics 3.2 Light, covering 3.2.1a Reflection of light, 3.2.1b Images in a plane mirror, 3.2.2 Refraction of light, 3.2.2a Refraction of light, 3.2.2b Total internal reflection, 3.2.2c Refractive index and critical angle, 3.2.2d Optical fibres, 3.2.3a Converging and diverging lenses, 3.2.3b Ray diagrams and the nature of images, 3.2.3c Virtual images and the magnifying glass, 3.2.3d Correcting long-sightedness and short-sightedness, and 3.2.4 Dispersion of light. Each one has a worked solution and a mark scheme showing where the marks go.

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