Search results
The lens equation expresses the quantitative relationship between the object distance (do), the image distance (di), and the focal length (f). The equation is stated as follows: . The magnification equation relates the ratio of the image distance and object distance to the ratio of the image height (hi) and object height (ho).
One student uses a lens of focal length 50 cm and another of -50 cm. What is the nature of the lens and its power used by each of them? Answer: The power of a lens is defined as the reciprocal of its focal length. The SI unit of power is diopter. Case 1 f = 50 cm = 0.50 m P = 1/0.50 = 2D Since the focal length is positive it is a convex lens Case 2
An answer key is provided with solutions to each problem. Concepts assessed include image formation by convex and concave lenses, magnification, and characteristics of real and virtual images. This document contains 10 numerical problems related to reflection and refraction of light by lenses.
What is the focal length of a diverging lens that has an object that is 10cm from the lens and an image that is 5 cm from the object? 8. A converging lens produces a virtual image from an object held to the left of it. A second converging lens is then placed to the right of the first converging lens. If the
Converging (convex) Lens Problems: Problem (1): A candle is placed at a distance of 30 cm from a converging lens having a focal length of 10 cm. (a) At what distance from the lens is the candle's image formed? (b) Is this image real or virtual? (c) Is this image upright or inverted?
This collection of problem sets and problems target student ability to use Snell's law of refraction to determine angles of refraction, index of refraction values, and critical angle values. The problems also target student ability to use the lens equation and magnification equation to determine the image distance, image height and ...
The goal is to solve these problems using the lens equation and express answers to two significant figures. This document contains 14 lens equation problems involving convex and concave lenses.
