An object is placed 50 cm from a convex lens of radius 60 cm. What are the characteristics of the image? A) virtual and upright   B) real and inverted   C) real and upright   D) virtual and inverted  An object is placed at a distance of 18.0 cm to the left of a thin converging lens of focal length 10.0 cm. Where does the image form?   A) 22.5 cm to the right of the lens   B) 22.5 cm to the left of the lens   C) 8.0 cm to the right of the lens   D) 6.4 cm to the right of the lens . What best describes the set of focal points of a thin convex lens? *   A) one focal point located either in front of or behind the lens   B) two focal points on opposite sides of the lens, each the same distance to the lens   C) two focal points on the same side of the lens, with one point twice as far from the lens as the other point   D) two focal points on opposite sides of the lens, with one point twice as far from the lens as the other point

Problem 96. Indicate the single lens type (converging or diverging) and object position that will lead to the following kind of images. If no single lens system can produce the particular image indicate that this is so. A) real, upright, enlarged image. B) huge image at "infinity". C) real, enlarged, inverted image. D) tiny inverted image very near the focal point. E) real, reduced in size, inverted image. F) virtual, reduced in size, upright image. G) virtual, enlarged, upright image. H) real, inverted image that is the same size as the object. I) virtual, enlarged, inverted image. Problem 97. You are handed a converging lens and you have a ruler. Describe two different simple ways to determine the focal length of this lens. Each way should involve making only one measurement.

The figure shows an object and its image formed by a thin lens. Assume that d1 = 0.781 m, d2 = 0.604 m, and h = 7.50E-2 m. What is the image height (in m; answer sign and magnitude)?

An object is 8.5 cm away from a thin convex lens with focal length of f1 = 3.1 cm. 8.0 cm away from the first convex lens is a second convex lens on the same optical axis with focal length of f2 = 2.1 cm. a) Draw a principal ray diagram for the optical system including the different focal lengths, image and object distances. b) Describe the nature (real or virtual) and orientation of the final image relative to the object. c) Calculate the position of the final image after the two lenses and its magnification.