8 real inverted smaller 017 100 points A convergent lens for

8. real, inverted, smaller 017 10.0 points A convergent lens forms a real image 0.89 times the size of the object. The distance between object and image is 29.7 cm Scale: 10 cm- Find the distance of the focal point from Answer in units of cm. the center of the lens. 018 10.0 points

Solution

m = v / i

m= magnification, v = image distance, u = object distance

0.89 = v / 29.7

v = 26.43 cm

1/f = 1/v + 1/u

1/f = 1/26.43 +1/29.7

f = 13.98 cm