Physics of the Ear and Eye · CAPE Physics Unit 1

115 past-paper questions on Physics of the Ear and Eye, part of Oscillations and Waves, from every CAPE Physics Unit 1 paper on Quelpr.

1. Q211 mark · multiple choice· CAPE Physics Unit 1 · 2007 · Paper 1Which of the following can correct the condition known as long sight?
2. Q271 mark · multiple choice· CAPE Physics Unit 1 · 2007 · Paper 1A motorbike emits an 80\text{ dB} noise. The intensity of the sound from the motorbike is
3. Q211 mark · multiple choice· CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1A converging lens has a focal length of 12\text{ cm}. If an object is placed 20\text{ cm} from the lens the image would be
4. Q241 mark · multiple choice· CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1The magnitude of the threshold of hearing at 1\text{ kHz} is
5. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2008 (Rest of Region) · Paper 1Two sound waves have intensities 0.1\text{ W m}^{-2} and 5\text{ W m}^{-2}. What is the difference in their intensity levels?
6. Q241 mark · multiple choice· CAPE Physics Unit 1 · 2008 (T&T) · Paper 1On what do the pitch and loudness of a sound wave depend?
7. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2008 (T&T) · Paper 1The near point of a defective eye is 30\text{ cm} from the eye. If the normal near point is 25\text{ cm} from the eye, the focal length of lens needed to correct this defect is
8. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2009 · Paper 1What is the ratio of the intensity of two sounds if one is 8.0\text{ dB} louder than the other?
9. Q291 mark · multiple choice· CAPE Physics Unit 1 · 2009 · Paper 1Accommodation in the human eye refers to
10. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2009 · Paper 1The near point of a defective eye is 30\text{ cm} from the eye. If the normal near point is 25\text{ cm} from the eye, the focal length of lens needed to correct this defect is
11. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2010 · Paper 1An object is placed 3\text{ cm} in front of a diverging lens of focal length 5\text{ cm}. Where will the image be found?
12. Q291 mark · multiple choice· CAPE Physics Unit 1 · 2010 · Paper 1Which of the following statements regarding lenses is/are correct? I. A converging lens always forms an image bigger than the object. II. An object placed in front of a converging lens can form a virtual image. III. A…
13. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2010 · Paper 1The near point of a defective eye is 30\text{ cm} from the eye. The normal near point is 25\text{ cm} from the eye. The focal length of the lens needed to correct this defect is
14. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2011 · Paper 1Accommodation in the human eye refers to the
15. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2012 · Paper 1What is the ratio of the intensity of two sounds if one is 8.0\text{ dB} louder than the other?
16. Q291 mark · multiple choice· CAPE Physics Unit 1 · 2012 · Paper 1The power of a lens of focal length 15\text{ cm} is
17. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2012 · Paper 1If an object is placed 10\text{ cm} in front of a converging lens of focal length 30\text{ cm}, where is the image formed?
18. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2013 · Paper 1Accommodation in the human eye refers to
19. Q261 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1Which of the following statements regarding lenses is/are correct? I. A converging lens always forms an image bigger than the object. II. An object placed in front of a converging lens can form a virtual image. III. A…
20. Q271 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1The near point of a defective eye is 30\text{ cm} from the eye. The normal near point is 25\text{ cm} from the eye. The focal length of the lens needed to correct this defect is
21. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1Accommodation in the human eye refers to the
22. Q291 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1The power of a lens of focal length 15\text{ cm} is
23. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1If an object is placed 10\text{ cm} in front of a converging lens of focal length 30\text{ cm}, where is the image formed?
24. Q361 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1Which of the following statements is true about vision?
25. Q231 mark · multiple choice· CAPE Physics Unit 1 · 2015 · Paper 1The power of a lens of focal length 15\text{ cm} is
26. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2015 · Paper 1A student's range of hearing is from 40\text{ Hz} to 15\text{ kHz}. What is the SHORTEST wavelength of sound that the student can hear if the speed of sound in air is 330\text{ m s}^{-1}?
27. Q371 mark · multiple choice· CAPE Physics Unit 1 · 2015 · Paper 1Which of the following statements is true about sight in human beings?
28. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2016 · Paper 1The power of a lens of focal length 15\text{ cm} is
29. Q291 mark · multiple choice· CAPE Physics Unit 1 · 2016 · Paper 1If an object is placed 10\text{ cm} in front of a converging lens of focal length 30\text{ cm}, where is the image formed?
30. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2016 · Paper 1The near point of a defective eye is 30\text{ cm} from the eye. The normal near point is 25\text{ cm} from the eye. The focal length of the lens needed to correct this defect is
31. Q261 mark · multiple choice· CAPE Physics Unit 1 · 2017 · Paper 1Item 26 refers to the following diagram. An object is placed 18\text{ cm} in front of a convex lens of focal length 12\text{ cm}. The position of the image formed is at
32. Q281 mark · multiple choice· CAPE Physics Unit 1 · 2017 · Paper 1Which of the following eye defects can be corrected by a cylindrical lens?
33. Q291 mark · multiple choice· CAPE Physics Unit 1 · 2017 · Paper 1How much intensity change in dB will take place with an increase in intensity from 1\text{ mW m}^{-2} to 100\text{ mW m}^{-2}?
34. Q301 mark · multiple choice· CAPE Physics Unit 1 · 2017 · Paper 1Accommodation in the human eye refers to the
35. 2(e)(i)2 marks· CAPE Physics Unit 1 · May/June 2021 · Paper 2Define the term 'threshold of hearing' and state its value for a healthy young adult.
36. 2(e)(ii)1 mark· CAPE Physics Unit 1 · May/June 2021 · Paper 2Write an equation showing the relationship between sound intensity level in dB and the threshold of hearing, I₀.
37. 2(e)(iii)2 marks· CAPE Physics Unit 1 · May/June 2021 · Paper 2At a party, the average sound intensity level is 90 dB. Determine the intensity in W m⁻².
38. 2(e)(iv)3 marks· CAPE Physics Unit 1 · May/June 2021 · Paper 2A student attends the party for 3 hours. Calculate the amount of energy incident on the eardrum if its surface area is 0.5 cm².
39. 2(a)(i)2 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Define depth of focus.
40. 2(a)(ii)2 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Define accommodation.
41. 2(a)(iii)2 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Define astigmatism.
42. 2(b)5 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Use annotated optical sketches to explain how short-sightedness occurs AND how the defect can be corrected.
43. 2(c)(i)3 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Show that the gradient of the graph in Figure 3 is equal to the focal length, f, of the converging lens.
44. 2(c)(ii)2 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2From the graph in Figure 3, determine a value for the focal length of the converging lens used.
45. 2(c)(iii)2 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Determine the power of the converging lens used in the experiment.
46. 2(f)4 marks· CAPE Physics Unit 1 · May/June 2024 · Paper 2Describe a simple experiment a teenager can perform to determine if the frequency response of his right ear is different from that of his left ear.
47. 2(a)(i)1 mark· CAPE Physics Unit 1 · May/June 2025 · Paper 2Name the process by which the human eye adjusts its focus to see objects clearly at varying distances.
48. 2(a)(ii)9 marks· CAPE Physics Unit 1 · May/June 2025 · Paper 2Complete Table 1 by describing myopia, hypermetropia, and astigmatism, stating the cause and the corrective lens needed for each.
49. 2(d)(i)4 marks· CAPE Physics Unit 1 · May/June 2025 · Paper 2Calculate the image distance of the person.
50. 2(d)(ii)5 marks· CAPE Physics Unit 1 · May/June 2025 · Paper 2Calculate the magnification AND the height of the image on the film of the camera.
51. 2(d)(iii)2 marks· CAPE Physics Unit 1 · May/June 2025 · Paper 2Based on your results from (d)(i) and (ii), comment on the nature of the image formed on the film.
52. 2(a)3 marks· Physics · Unit 1 Q2 2(a)Briefly explain how you would take readings in order to determine the magnification of the image for various values of x.
53. 2(a)(i)1 mark· Physics · Unit 1 Q2 2(a)(i)Define Loudness.
54. 2(a)(i)1 mark· Physics · Unit 1 Q2 2(a)(i)Identify the grandmother's eye defect.
55. 2(a)(i)1 mark· Physics · Unit 1 Q2 2(a)(i)What is the approximate range of frequencies which can be heard by a young adult with normal hearing?
56. 2(a)(ii)1 mark· Physics · Unit 1 Q2 2(a)(ii)Define Pitch.
57. 2(a)(ii)3 marks· Physics · Unit 1 Q2 2(a)(ii)A fifteen-year-old girl frequently listens to her iPod via a single earphone placed in her right ear. Describe an experiment which you could do in the physics laboratory to test whether the frequency response of her…
58. 2(a)(ii)1 mark· Physics · Unit 1 Q2 2(a)(ii)Name the type of lens that could be used to correct the eye defect identified in (a)(i).
59. 2(a)(iii)1 mark· Physics · Unit 1 Q2 2(a)(iii)Define Quality.
60. 2(b)1 mark· Physics · Unit 1 Q2 2(b)Figure 2 is a plot of m versus x.
61. 2(b)(i)2 marks· Physics · Unit 1 Q2 2(b)(i)Sketch a diagram of the eye clearly showing how the grandmother's eye forms the image without her corrective lens.
62. 2(b)(ii)2 marks· Physics · Unit 1 Q2 2(b)(ii)Sketch a diagram of the eye clearly showing how the grandmother's eye forms the image with her corrective lens.
63. 2(b)(ii)1 mark· Physics · Unit 1 Q2 2(b)(ii)Show that when m = 0, x + d = f.
64. 2(c)5 marks· Physics · Unit 1 Q2 2(c)Calculate the power of the lens needed to correct her eye defect.
65. 2(c)(ii)b)1 mark· Physics · Unit 1 Q2 2(c)(ii)b)Determine the focal length, f, of the lens.
66. 2(c)(ii)c)1 mark· Physics · Unit 1 Q2 2(c)(ii)c)Determine the position d of the lens inside the tube.
67. 2(d)8 marks· Physics · Unit 1 Q2 2(d)By scale drawing, determine the image height and image distance.
68. 2(e)2 marks· Physics · Unit 1 Q2 2(e)With the aid of a diagram, show how an image is formed in a simple camera.
69. 5(a)4 marks· Physics · Unit 1 Q5 5(a)Long-sightedness is an eye defect that affects many persons. Explain, using suitable optical sketches, how long-sightedness occurs and how it can be corrected.
70. 5(a)(i)1 mark· Physics · Unit 1 Q5 5(a)(i)Explain what is meant by 'Accommodation' as it relates to the human eye.
71. 5(a)(i)2 marks· Physics · Unit 1 Q5 5(a)(i)Distinguish between the terms 'threshold of hearing' and 'threshold of pain' when applied to the intensity of sound.
72. 5(a)(i)1 mark· Physics · Unit 1 Q5 5(a)(i)Explain what is meant by 'threshold of hearing' and 'threshold of pain'.
73. 5(a)(ii)1 mark· Physics · Unit 1 Q5 5(a)(ii)Explain what is meant by 'Depth of focus' as it relates to the human eye.
74. 5(a)(ii)2 marks· Physics · Unit 1 Q5 5(a)(ii)What TWO properties of the human ear makes the decibel (dB) scale particularly useful?
75. 5(a)(ii)1 mark· Physics · Unit 1 Q5 5(a)(ii)What property of the human ear makes the decibel (dB) scale particularly useful?
76. 5(a)(iii)1 mark· Physics · Unit 1 Q5 5(a)(iii)Write down an expression that relates the sound intensity I, to the intensity level β, in dB.
77. 5(a)(iii)6 marks· Physics · Unit 1 Q5 5(a)(iii)Determine the intensity of such a sound in W m⁻².
78. 5(a)(iv)1 mark· Physics · Unit 1 Q5 5(a)(iv)What is the intensity level of a sound with intensity 3.82 mW m⁻²?
79. 5(a)(v)7 marks· Physics · Unit 1 Q5 5(a)(v)Figure 6 is drawn for a typical human ear. Suggest how the figure might change as a person ages.
80. 5(b)3 marks· Physics · Unit 1 Q5 5(b)Use a ray diagram to show how focused images are formed in a magnifying glass.
81. 5(b)(i)5 marks· Physics · Unit 1 Q5 5(b)(i)Name the student's eye defect.
82. 5(b)(ii)5 marks· Physics · Unit 1 Q5 5(b)(ii)Copy Figure 3 onto your answer booklet. On the copied diagram, draw a ray diagram to illustrate the paths of two light rays from a point object at the normal near point, showing how they would reach the retina of the…
83. 5(b)(iii)5 marks· Physics · Unit 1 Q5 5(b)(iii)Draw a second ray diagram to show how a lens may be used to correct the defect for an object set at 25 cm from the eye.
84. 5(c)(i)4 marks· Physics · Unit 1 Q5 5(c)(i)Determine the position of the image and its distance from the lens.
85. 5(c)(i)4 marks· Physics · Unit 1 Q5 5(c)(i)Calculate the position of her near point at age 45.
86. 5(c)(ii)1 mark· Physics · Unit 1 Q5 5(c)(ii)Determine whether the image is virtual or real.
87. 5(c)(ii)2 marks· Physics · Unit 1 Q5 5(c)(ii)Calculate the position of her near point at age 55.
88. 5(c)(iii)3 marks· Physics · Unit 1 Q5 5(c)(iii)Determine the magnification of the image and hence its orientation.
89. 5(c)(iii)2 marks· Physics · Unit 1 Q5 5(c)(iii)Calculate the power of the lens of the reading glasses now required so that she can again read at 25 cm.
90. 6(a)2 marks· Physics · Unit 1 Q6 6(a)Define the term 'principal focus of a lens'.
91. 6(a)2 marks· Physics · Unit 1 Q6 6(a)Explain what is meant by the loudness of a sound.
92. 6(a)(i)3 marks· Physics · Unit 1 Q6 6(a)(i)Explain the following terms as they relate to the human eye: Accommodation.
93. 6(a)(ii)3 marks· Physics · Unit 1 Q6 6(a)(ii)Explain the following terms as they relate to the human eye: Astigmatism.
94. 6(a)(iii)3 marks· Physics · Unit 1 Q6 6(a)(iii)Explain the following terms as they relate to the human eye: Cataract.
95. 6(a)(iii)3 marks· Physics · Unit 1 Q6 6(a)(iii)Give the THREE subjective sensations of sound and state what objective quantities are associated with them.
96. 6(b)6 marks· Physics · Unit 1 Q6 6(b)Describe with the aid of diagrams the response of the ear to sound waves in terms of frequency, intensity and loudness level.
97. 6(b)2 marks· Physics · Unit 1 Q6 6(b)Draw a ray diagram to illustrate the formation of the image of an extended object by a convex lens when the object is at a distance from the lens, greater than the focal length of the lens, but less than twice the focal…
98. 6(b)(i)7 marks· Physics · Unit 1 Q6 6(b)(i)With the aid of a diagram explain the eye defect from which she suffers.
99. 6(b)(i)8 marks· Physics · Unit 1 Q6 6(b)(i)Explain the terms 'intensity of sound' and 'threshold of hearing'. State the intensity level, in dB, for the threshold of hearing.
100. 6(b)(ii)3 marks· Physics · Unit 1 Q6 6(b)(ii)What is the intensity level at 20 m?
101. 6(b)(ii)7 marks· Physics · Unit 1 Q6 6(b)(ii)Determine the woman's near point (i.e. the distance from her eyes where she can see objects clearly without her glasses).
102. 6(b)(ii)a)1 mark· Physics · Unit 1 Q6 6(b)(ii)a)Deduce the intensity of the sound from a motor-bike where the intensity level is 80 dB.
103. 6(b)(ii)b)1 mark· Physics · Unit 1 Q6 6(b)(ii)b)A person's ear collects sound from an effective area of 0.4 cm². What is the power incident on the ear at the threshold of hearing?
104. 6(b)(iii)6 marks· Physics · Unit 1 Q6 6(b)(iii)Given that the intensity (in W m⁻²) of the sound is inversely proportional to the distance, x, from the speaker (I ∝ 1/x²), find the distance at which the intensity level will be at the pain threshold of 120 dB.…
105. 6(c)(i)4 marks· Physics · Unit 1 Q6 6(c)(i)Draw a ray diagram to show how an image is formed in a diverging lens.
106. 6(c)(i)10 marks· Physics · Unit 1 Q6 6(c)(i)What intensity of sound is considered to be the threshold of human hearing?
107. 6(c)(ii)4 marks· Physics · Unit 1 Q6 6(c)(ii)Compare the images formed in (b) and (c)(i).
108. 6(c)(ii)1 mark· Physics · Unit 1 Q6 6(c)(ii)Calculate the intensity in Wm⁻² of the sound at the point Q.
109. 6(c)(ii)10 marks· Physics · Unit 1 Q6 6(c)(ii)Why is the response of the human ear said to be logarithmic?
110. 6(c)(iii)10 marks· Physics · Unit 1 Q6 6(c)(iii)Explain why sound intensity levels are often measured using a decibel (dB) scale.
111. 6(c)(iv)10 marks· Physics · Unit 1 Q6 6(c)(iv)A noisy motorbike emits noise with an intensity of 6 x 10⁻² W m⁻². What is the intensity level in dB?
112. 6(c)(v)10 marks· Physics · Unit 1 Q6 6(c)(v)Over what range of frequencies would a normal human ear be able to hear a sound with an intensity level of 20 dB?
113. 6(d)(i)6 marks· Physics · Unit 1 Q6 6(d)(i)How far above the transparency must the lens be held in order for the image to be formed on the screen?
114. 6(d)(ii)6 marks· Physics · Unit 1 Q6 6(d)(ii)What is the magnifying power of the lens and how does this affect image formed?
115. 7(c)(iii)8 marks· Physics · Unit 1 Q7 7(c)(iii)Calculate the change in the intensity level when the power output from a piano changes from 100 mW to 200 mW.