Lab M Thin lenses.docx - Lab M Thin lenses Objectives 1 To measure the focal lengths of converging and diverging lenses 2 To study the image formation

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Lab M: Thin lenses Objectives 1. To measure the focal lengths of converging and diverging lenses. 2. To study the image formation of thin lenses graphically and analytically. 3. To study the image formation of thin lenses by doing experiments. Background The thin-lens equation for both converging and diverging lenses is 1/d o + 1/d i = 1/f . For converging lenses, f is positive and for diverging lenses, f is negative. If an object is to the left of the lens, the distance from the object to the lens is positive and if an object is to the right of the lens, d o is negative. If an image is to the right of the lens, the distance from the image to the lens is positive and if an object is to the left of the lens, d i is negative. Positive images distances indicate real images, and virtual images have negative image distances. Procedure Part I A. Focal length measurement of converging lens 1. Place the light bulb and the cross slit at one end of the optical bench. Please keep the

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• Spring '17
• HalinaOprychal
• Physics