Leah and Arif now do a practice problem. Suppose you are in a partially darkened room holding a flat piece of white cardboard in one hand and a converging lens of focal distance 3.7 10-2 m in your other hand. You want to form an image of the window in front of you, which is at a distance of 2.34 m in front of the lens. How far behind the lens should the cardboard be held to form as sharp an image as possible? m If the height of the window is 1.00 m, find the height of its image.

Leah and Arif now do a practice problem. Suppose you are in a partially darkened room holding a flat piece of white cardboard in one hand and a converging lens of focal distance 3.7 10-2 m in your other hand. You want to form an image of the window in front of you, which is at a distance of 2.34 m in front of the lens. How far behind the lens should the cardboard be held to form as sharp an image as possible? m If the height of the window is 1.00 m, find the height of its image.