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Wave Interactions (OCR GCSE Combined Science A (Gateway): Physics)

Exam Questions

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Wave Interactions

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Wave Interactions

1
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Which of the following statements about the refraction of electromagnetic waves is correct?

  • Electromagnetic waves are refracted because each group travels at a different speed in a vacuum.

  • Electromagnetic waves are refracted when they pass between the boundary of two media at 90° to the boundary.

  • Electromagnetic waves are refracted by different amounts when they encounter a material because each grouping travels at different speeds in different materials.

  • Electromagnetic waves are refracted because they all have the same wavelength in all materials.

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21 mark

Higher Tier Only

The diagram shows white light passing through a prism.

q15-paper4-june2018-ocr-gcse-physics

A spectrum of colours is seen. It ranges from red to violet.

Why does the violet light refract more than the red light?

  • Violet light changes frequency more than red light.

  • Violet light has the largest change in speed.

  • Violet light has the smallest change in speed.

  • Violet light increases its speed in the glass prism.

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31 mark

Which diagram shows the correct focal length of a convex lens?

Four lens diagrams labelled A to D show light rays converging through convex lenses, each demonstrating different focal points and distances, as follows: A is parallel to the lens height, B is from the lens to the point where the rays meet, C is the distance from where the rays meet before and after the lens, D is from where the rays meet on the right side to the lens.

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    4
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    Which diagram correctly shows the formation of a real image on a screen?

    All options have one ray passing horizontally from object to lens axis and then down to the right below the axis on the screen. Rays at 2 x focal length, A ray from object to below axis, B ray meets lens at axis and continues to meet the other at the screen. For rays at focal length C has second ray reaching the screen above the axis, D has a ray that meets lens at the axis and meets the other at screen.

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      5
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      Which of the following correctly describes the properties of the image produced by the lens shown in the diagram?

      Diagram of a convex lens showing rays from an object at 2f converging to form an image beyond the lens focal point on the right side.

      • real, diminished, inverted

      • virtual, magnified, inverted

      • real, magnified, inverted

      • virtual, diminished, upright

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      6
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      Which of the following correctly describes the properties of the image produced by the lens shown in the diagram?

      Diagram illustrating ray tracing for a diverging lens, showing an object, image, rays, focal point, and lens curvature.

      • real, diminished, inverted

      • virtual, magnified, inverted

      • real, magnified, inverted

      • virtual, diminished, upright

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