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Student Files. two lenses of equal focal length f 1 =f 2 =f, since the purpose of the proposed experiment. Pop Up Procedure Simulation. Materials: • optical bench • lenses • object box • screen Preliminary Questions: 1) An object with a height of 2cm is placed at a distance d=20 cm in front of a converging lens with a focal distance f=5cm. Determining Focal Lengths of Concave and Convex Lenses The mirror in this case is combination of three mirrors. The triangular end of the rhombus is used as a prism in this experiment. 2. The mathematics can be simplified by taking. Lenses - Complete Toolkit - Physics Classroom Converging lenses have a positive focal length and form both real and virtual images, while diverging lenses have a negative focal length and form only . PDF 1 Thin Lenses and Thin Lens Combinations To see why this works look at the thin lens formula: 1 (1) 1 f = 1 d o + 1 d i, Mount the light source, the cross-arrow target and the viewing screen on the optical bench. Check that the convex lens in contact with the given concave lens forms an enlarged image of a nearby object. Length of the index needle as measured by the scale, s = … cm. Focal Length and Magnification of a Thin Lens - College Lab Experiments ... My detailed lab reports from Physics 2 Lab with Dr. Sorci. (c) For the radius of curvature of the convex lens surface . Determination of the focal length of a convex lens and the focal length of a concave lens by the r'onj11.gate foci method: (e) Mount the light source S (Fig. Because the focal length measures a distance, it uses units of length, such as centimeters (cm), meters (m), or inches . The set-up consists of Nodal Slide Assembly, Light source, slit, convex lenses, object screen and base support. combination of convex and concave lens - alihilli.com Two converging lenses of equal focal length, since the lens are diverging and they will cross. PDF Experiment 7 - Lenses and the Human Eye - Physics Courses Suppose a convex lens of focal length 9.0cm was used in combination with a concave lens of focal length 15.0cm. Scott Huang - Liquid Lens Project - Stony Brook University Apparatus: A LED light as a point source, two convex lenses of known focal length and a concave lens of unknown focal length, graph paper and lens holders. A match is held a distance s_0 = 13.7 cm to .