Answer to Question 8
1/f = 1/u + 1/v -1/40 = 1/20 + 1/v 1/v = -0.025 - 0.05 = -0.075 v = - 13.3 cm magnification = v/u = -13.3/20 = (-)0.667 Therefore the image is 1.47 cm across
1/f = 1/u + 1/v
-1/40 = 1/20 + 1/v
1/v = -0.025 - 0.05 = -0.075
v = - 13.3 cm
magnification = v/u = -13.3/20 = (-)0.667
Therefore the image is 1.47 cm across
