Question

just the conclusion and the question parts + the graph of M versus q

thanks!

Experiment 12 Thin Lenses Purpose The purpose of this experiment is to veily the thin lens equation and to determine the focal length of an optical thin lens Apparatus The apparatus used in this experiment consists of an opical bench, a light source with built-in object, a thin lens, a screen and a smaill plastic scale. Theory A thin lens is an optical system with two refracting surfaces that are cose enough to each other that we can neglect their separation. Light rays passing through a thin lens are refracted. changing their direction of A converging thin lens is one that wll focus a beam of paralel rays to a single point called he focal point of the lens. A common form of a converging lens is a double convex lens that consists of two convex curved surfaces having the same curvature The distance from the focal point to the centre of the lens is called the focal length of the lens Converging lenses are ofien used to fom images of extended objects. 82 EXPERIMENT 2. THIN LENSES 85 Analysis A) Use the experimental data to determine the object distance, p, the the results in a new table. Caloulate Lip and lig in the same table. B) Plot a graph of versus 1p and determine the slope and both image distance, g·and the magrification Ar, for each tal ad record intercepts C) Plot the magnification, M or -M vesus g and determine this graph's sope and intercepts Conclusion What is the significance of the slope of the graph in part B of the analysis? From the intercepts calculate the focal length of the lens Determine the slope and both interoepts of the part C graph as well. You can get two more values for the focal length. Compare all four values of the focal length that you have calculated from both graphs. If necessary rewnte the equations into the form of a straight line in your theory section to help with your analysis Questions 1. In this experiment we considered only real objects and real images and thus our data les in the first quadrant of the cartesian plane. It is also possible to have vitual images or even virtual objects. Sketch the complete lig versus Lip curve for all four quadrants. 2 Sketch the q versus p curve and show the asymptoles

Answer 1

The q Vs p graph is slightly decreased and M is the decrease.

0 RA PR 5