A plano-convex lens with refraction index n=1.517, Front radius R1 = 10 cm is used to create image for an object placed 50 cm away from the lens. Find: 1)The focal length f of the lens. 2)The image position compared to the lens. 3)The magnification.

Homework 12 Problem 10:   Two lenses are mounted d = 27 cm apart on an optical bench. The focal length of the first lens is f1 = 5.1 cm and that of the second lens is f2 = 4.4 cm. An object of height ho = 3.5 cm is placed at a distance of do = 21 cm in front of the first lens. Part (a)  Ignoring the second lens for now, at what distance, in centimeters, behind the first lens is the object’s image formed by that lens? di = ______ Part (b)  Calculate the magnification of that image, including its sign. m = ______ Part (c)  Now consider the two-lens system and the final image it forms, i.e., the image created by the second lens. What is the distance, in centimeters, between the object and its final image? D = ______

A measurement indicates that a patient cannot clearly see any object that lies closer than 60.8 cm to the patient's eye. (a) Which of the following terms best describes this distance? far pointnear point    magnificationfocal length (b) The patient needs to be able to clearly see objects that are just 24.0 cm distant. A contact lens is made to order. What focal length (in cm) should this lens have? Assume the lens can be modeled as an ideal thin lens, which lies adjacent to the eye.  cm (c) What is the power, P, of the contact lens (in diopters)?  diopters

In a compound microscope, the objective has a focal length of 1.0 cm, the eyepiece has a focal length of 2.0 cm, and the tube length is 25 cm. What is the magnitude of the overall magnification of the microscope?

Example 2: What is the image distance when a pencil is placed 29.7 cm from a diverging lens of focal length f = -9.9 cm. q743 cm. M 0 25 The image is (real / virtual) The image is (upright / inverted) The image distance is The Magnification, M =