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Physics 2003 WAEC Past Questions

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21
The horizontal floor of a water reservoir appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.35, calculate the real depth of the reservoir
  • A. 2.35m
  • B. 1.35m
  • C. 1.00m
  • D. 0.35m
View Answer & Discuss WAEC 2003
22
A converging lens has a focal length of 5cm. Determine its power
  • A. +20.0
  • B. +0.2
  • C. -20.00
  • D. -0.2
View Answer & Discuss (6) WAEC 2003
23
Which of the following pairs of rays shows the widest separation in the spectrum of white light?
  • A. green and blue
  • B. orange and indigo
  • C. blue and violet
  • D. red and yellow
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24
Which of the following statements about the human eye and the camera is correct?
  • A. both form virtual image of objects
  • B. the image formed by the eye is upright in the retina while that formed by the camera is inverted on the film
  • C. the inside of both of them is blackened to absorb unwanted light
  • D. the focal length of both eye lens and the camera lens can be varied
View Answer & Discuss WAEC 2003
25
The speed of sound in air is is directly proportional to
  • A. its temperature on the celsius scale
  • B. ite temperature in the thermodynamic scale
  • C. the cube root of its temperature on its celcius csale
  • D. the square roor of its temperature on the absolute scale
View Answer & Discuss WAEC 2003
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