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2 marksRefraction

CSEC Physics · May/June 2009 · Paper 2 · Question 3(a)(iii)

A traveler on a hot road sees a mirage, an image of a distant object directly below it, as shown in Figure 1. Three light rays are labeled A, B, and C.

With reference to the normal, the temperature and the density of the air, explain the direction of the bending of Ray B at Point x.

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Other parts of this question

  1. 3(a)(i)Why does Ray A travel in a straight line from the object to the observer?[1 mark]
  2. 3(a)(ii)What is the name given to the bending of Ray B as it approaches the hot surface?[1 mark]
  3. 3(a)(iv)The mirage is a virtual image. With reference to Rays B and C, explain how the mirage is formed and why it is described as a virtual image.[2 marks]
  4. 3(b)(i)a)In terms of the distances a and d, write an expression for the distance travelled by the sound pulse after reflection from the front of the skull to the sound…[1 mark]
  5. 3(b)(i)b)In terms of the distances a and d, write an expression for the distance travelled by the sound pulse after reflection from the back of the skull to the sound…[1 mark]
  6. 3(b)(ii)a)Determine the difference in distance travelled between the first and the second echo[2 marks]
  7. 3(b)(ii)b)Determine the diameter, d, of the baby's skull.[1 mark]
  8. 3(c)(i)The object O is 100 m from the centre of the eye lens and the magnification of the eye lens is 0.005. Determine the distance of the retina from the centre of…[3 marks]
  9. 3(c)(ii)Write a formula for calculating the magnification of the eye lens using the object height and the image height[1 mark]

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