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2 marksRefraction

CSEC Physics · January 2017 · Paper 2 · Question 4(a)(iii)

Figure 3 shows a ray of light travelling from air to water.

As the light ray travels from air to water, determine if the speed of the light ray will increase or decrease. Give a reason for your response.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 4(a)(i)State TWO examples of observations which provide evidence that light can be refracted.[2 marks]
  2. 4(a)(ii)Complete Figure 3 by adding the normal at the point of incidence, the refracted ray, and indicating the angles of incidence and refraction.[3 marks]
  3. 4(b)(i)What is the name of the effect that is created?[1 mark]
  4. 4(b)(ii)On Figure 4 above, trace the path of the white light into and out of the prism indicating the red ray and the violet ray.[2 marks]
  5. 4(c)(i)Complete Table 2 by inserting the missing values.[2 marks]
  6. 4(c)(ii)Determine the angle of refraction if an incident angle of 70° was recorded for this experiment. (Use the refractive index of glass as 1.52.)[3 marks]

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