The thin lens equation describes the relationships between the distance of an object from the lens (d), the distance of the image from the lens (g), and the focal length of the lens ().
*+-;
If the object distance (d) is twice the image distance (g), what is the object distance when the
focal length is 10 centimeters?
A 5 centimeters
B. 10 centimeters
C 15 centimeters
D. 30 centimeters