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GCSEScienceOCRCombined Science A (Gateway)PhysicsExam QuestionsWaves in MatterWave Interactions

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

Exam Questions

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Wave Interactions

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Wave Interactions

1a
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The diagram shows the interaction of EM waves as they pass from one medium, into a second and then continue into the same medium as the first.

Diagram showing unlabelled wave behaviour: as a wave encounters a barrier. Labels to complete indicate each process in the sequence.

Label the diagram with the correct word(s) for the wave interactions by writing them in the correct boxes.

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1b
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Higher Tier Only

The diagram shows light waves passing from air into glass.

Diagram showing light refraction from air to glass. An incident ray and wavefronts bend as they enter the glass block, denoting the change in speed.

Which effect is shown in the diagram?

square   Dispersion

square   Diffraction

square   Refraction

square   Reflection

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1c
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Higher Tier Only

On the diagram shown in part (b):

i) Draw the normal to the incident ray.

[1]

ii) Label the angle of incidence on the diagram.

[1]

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1d
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Higher Tier Only

Complete the table by drawing a tick to show which properties of light change during refraction.

Property

Does change

Does not change

speed

 

 

wavelength

 

 

frequency

 

 

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2a2 marks

A projector is used to create a larger image of an object.

The diagram shows one light ray as it passes through the convex lens.

Draw one more ray on the diagram to show where the image is formed. Label the image Y.

Diagram of a convex lens focusing light rays from an object. The focal points are marked as F on a grid background. Labels indicate key elements.

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2b3 marks

i) The projector is connected to the mains power supply. The projector has an earth wire.

State the potential difference between the earth wire and the live wire in normal use.

Potential difference = ................................................V[1]

ii) A projector with a plastic case does not need an earth wire. A projector with a metal case needs an earth wire.

Explain why.

[2]

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3a
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The diagram shows an object positioned close to a thin converging lens (inside the focal distance). Three light rays are shown leaving the object and passing through the lens.

Diagram showing a converging lens with three rays: parallel, through the lens's centre, and converging at a focal point on the opposite side.

Describe the location, type and size of image formed.

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3b2 marks

Explain the possible changes that could be made to the scenario in part (a) for a real image to be formed.

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