A concave mirror of radius of curvature 20cm has a pin placed at 15cm from...
PHYSICS
WAEC 1990
A concave mirror of radius of curvature 20cm has a pin placed at 15cm from its pole. What will be the magnification of the image formed?
- A. 4.00
- B. 2.00
- C. 1.33
- D. 1.50
Correct Answer: B. 2.00
Explanation
1/U + 1/V = 1/f f = r/2 = 10cm; 1/15 + 1/v = 1/10 v = 30 = m = v/u = 2
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