WAEC - Physics (1990 - No. 29)
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?
4.00
2.00
1.33
1.50
0.25
Објашњење
1/U + 1/V = 1/f
f = r/2 = 10cm; 1/15 + 1/v = 1/10
v = 30 = m = v/u = 2
f = r/2 = 10cm; 1/15 + 1/v = 1/10
v = 30 = m = v/u = 2