KEY CONCEPT FIGURE 18.32 Rays from an object point P are refracted by the lens and converge to a real image at point P'. Rays leave P (and Q and R) in every direction. For clarity, only a few are shown. Special rays All the rays leaving one point in the object plane (P) that reach the lens are refracted by it and converge to one point in the image plane (P"). Lens plane Object height h This is a Far focal point real image. Object R' Image height h' Near focal point Optical axis Object plane Image plane Cardboard Screen Lens

Two converging lenses with focal lengths of 50 cm and 21 cm are 10 cm apart. A 3.9- cm-tall object is 25 cm in front of the 50-cm -focal-length lens. A. Calculate the distance between the final image and 21-cm-focal-length lens. B. Calculate the image height.

3. An object sits 23 cm in front of a diverging mirror. An image is formed 14 cm behind the mirror. What is the focal length of the mirror? a. b. What is the magnification of the image?

A bug is 3 cm to the left of a lens with f = -4.56 cm. Find the image distance from the lens. A second lens of f = 8 cm is placed 1.21 cm to the right of the first lens. Find the distance of the final image from the second lens. Use the image from the first lens as an "object" for the second lens. The final image is: A. Upright B. Inverted   The final image is: A. Real B. Virtual

A concave lens has a focal length of -45 cm. a) Find the image distance that results when an object is placed 32 cm in front of the lens. b) Find the magnification that results when an object is placed 32 cm in front of the lens.

A lens forms an image of an object. The object is 15.4 cm from the lens. The image is 11.7 cm from the lens on the same side as the object. a. What is the absolute value of the focal lens of the lens? cm b. Is the lens converging or diverging? converging diverging c. If the object is 8.48 mm tall, how tall is the image? mm d. Is the image upright or inverted? upright O inverted e. To receive full credit for this problem you will need to draw a principal ray diagram, including three principal rays. yes, got it - I will attach the diagram in Canvas with the rest of my work. no, I don't have a diagram to attach.

A doctor examines a mole on the patient with a 17.2 cm focal length magnifying glass held 11.2 cm from the mole.  Describe the image the doctor sees. A.Real  B. Virtual  C. Inverted  D. Upright  E. Smaller than object F. Larger than object

Which of the following scenarios is a reasonable representation of a nearsighted person wearing proper corrective lenses?   A.Light passes through a concave lens and then another concave lens. B. Light passes through a convex lens and then a concave lens C.Light passes through a concave lens and then a convex lens D. light passes through a convex lens and then another convex lens

Which of the following statements for single optic devices are true? Choose all that apply. a. Any physicist worth their weight in garbanzo beans (not chick peas) knows that concave lenses will have a positive focal length. b. For virtual images, the image distance is positive and the object distance is negative. c. By convention, if the image height is positive then the image is upright. d. If an optic produces an image with a magnification of 0.6, then the image is diminished. e. Experiments have shown that convex mirrors can create real images. f. If an image has a magnification of -6, then the image is real.

6. An object is 185 cm from a convex lens with a focal length of 25 cm. When an inverted image is 12 cm tall, how tall is the associated object? 7. What are the image height and orientation produced by the setup in the following figure? Object 5.0 cm – 10.0 cm - 15.0 cm