Which of the following statements are true of diverging lenses? Identify all that apply. Diverging lenses are thicker at the center than they are at the edges. If the bottom half of a diverging lens is covered, then the bottom half of the image will not be visible. Diverging lenses only produce virtual images. Diverging lenses can produce images which are both magnified and reduced in size. Diverging lenses only produce upright images. Diverging lenses have a - focal length. The images formed by a diverging lens can be located on either side of the lens relative to the object.

*5. A pebble 1 cm tall is placed 40 cm to the left of a +5-diopter lens. A -5-diopter lens is placed 30 cm to the right of the first lens. Where will the final image be located, and will it be real or virtual? What will be the size of the final image, and will it be erect or inverted? P=-5 D 1 cm 40 cm- P₁ = +5 D t 30 cm-

If the screen is at the right position and the object is in a right position, the lens will focus the image of the object onto the screen.  If the screen is anywhere else, the object will look blurry or won't be seen.  The optical table has a meter-tape attached to the side, to give the position of the items. If the object is in a wrong position, the lens will defocus the light -- spread it out.  That means that the screen can't be placed anywhere to display a focused image.   If xL = 32.7 cm and the focal length is f = 20.8 cm, give a position (xO) that results in the light from the object spreading out.  (There are infinitely many such positions.)

Create a ray diagram for eyeglasses that contain a diverging lens. Assume you are looking at a 2 cm tall object that is 4 cm from the lens. The focal length is 3 cm. What type of vision are they used to correct? Give both names. How do they do this? Explain.