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Physics 1999 WAEC Past Questions

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21

A ray of light is incident on 'a plane mirror at an angle of 20o. This mirror is rotated through, twice this angle, In this new position the angle between the incident ray and the reflected ray is

  • A. 20o
  • B. 40o
  • C. 80o
  • D. 120o.
View Answer & Discuss (9) WAEC 1999
22
The air column in a resonance tube is set into resonance by a vibrating tuning fork. The resultant waves in the air column will be
  • A. mechanical and transverse
  • B. progressive and longitudinal
  • C. stationary and transverse
  • D. stationary and longitudinal.
View Answer & Discuss WAEC 1999
23

The image of an object is located 6cm behind a convex mirror. If its magnification is 0.6, calculate the focal length of the mirror

  • A. 3.75cm
  • B. 6.60cm
  • C. 10.00cm
  • D. -15.00cm
View Answer & Discuss (32) WAEC 1999
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24
The refractive index of glass for yellow light is greater than that for red light because yellow light
  • A. has a greater amplitude than red light
  • B. is more intense than red light
  • C. travels more slowly than red light
  • D. deviates less than red light
View Answer & Discuss (7) WAEC 1999
25
The real image of an object formed by a converging lens of focal length 15cm, is three times the size of the object. Calculate the object distance
  • A. 60cm
  • B. 30cm
  • C. 20cm
  • D. 15cm
View Answer & Discuss (5) WAEC 1999
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