1) A lens is used to form an image of an object as shown below.

What is the likely application this lens is being used for?

2) The human eye has a converging lens system that produces an image at the back of the eye. If the eye views a distant object, which type of image is produced?

3) The diagram below shows object O, the image I formed from the light passing through lens L.

Which distance is the object distance?

4) An astronomer uses a converging lens to observe the moon. If the focal length of the lens in the telescope is 20 cm, what is the distance from the observer's eye to the lens in the telescope to see a clear image of the moon?

5) A converging lens always