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3.2 Light

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Question 109

An object is placed in front of a thin converging lens of focal length fff. A real image is formed on a screen on the opposite side of the lens.

To locate the image, two rays are traced from the top of the object:

  • Ray 1 is initially parallel to the principal axis.
  • Ray 2 is directed towards the optical center of the lens.

Which of the following correctly describes the path of these two rays after passing through the lens?

A

Ray 1 refracts and passes through the principal axis at a distance of 2f2f2f from the lens, while Ray 2 passes through the optical center and continues in a straight line without bending.

B

Ray 1 refracts and passes through the principal axis at a distance of 2f2f2f from the lens, while Ray 2 bends at the lens and does not continue in a straight line.

C

Ray 1 refracts and passes through the principal axis at a distance of fff from the lens, while Ray 2 passes through the optical center and continues in a straight line without bending.

D

Ray 1 refracts and passes through the principal axis at a distance of fff from the lens, while Ray 2 bends at the optical center and does not continue in a straight line.

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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