Determine the object's distance from the biconvex lens if the image's magnification is -2 and the image distance is 17 cm. a. 8.50 cm b. 1.79 cm c. 2.27 cm d. 17.0 cm

7) A slide projector has a 100 mm-focal length lens.a. How far away is the screen if a slide is placed 103 mm from the lens and produces a sharp image? b. If the slide is 24.0 by 36.0 mm, what are the dimensions of the image? c. Draw a principal ray diagram for this situation, using the given object height in part (a) and focal. Be sure each diagram contains the three principal rays discussed in class. You do not need to use a ruler, protractor, or graph paper, but make a reasonable attempt to draw the diagram to scale by eye.

To view an insect, an entomologist places a converging lens with a focal length of 10 cm a distance of 8.0 cm from the insect. What will be the magnification of the insect's image?   a. +5   b. +3   c. +4   d. +6   e. +7

w9-9 A converging lens has a focal length of 8.00 cm. What is the nature of the image formed when the object is placed at a distance of 20.0 cm from the lens? a. real, inverted, and diminished b. virtual, upright, and enlarged c. real, inverted, and enlarged d. virtual, upright, and diminished