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Lab 13: Focal Length of LensMuhammad KhanNick KaseckyAmber HonsakerPHYS 242624 April 2019
Intro: The focal length of a spherical lens may be determined by use of the Fundamental Lens Equation. 1p+1q=1fThe magnification of the image is given by the equation. M=hiho=−qpWe will use these eqautions in our lab to complete our data table. The first equation also known as the Lens maker Equation is widely used in optometry. The second is the magnification equation which will let us know if the image is magnified or is smaller then the original object height. Procedure:●Set up the equipment as shown in the figure. Place the object, the crossed arrow target, onthe front of the light source.●Put the lens 500 mm from the light source, ie. Object distance p=500 mm.●Move the viewing screen back and forth until the image is in focus. Measure the image distance and image height.●Record the image distance, q, and height, hi, in the data table. Calculate the focal length and magnification, and record these.