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Experiment to Find the Focal Length and Power of a Diverging Lens.
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Joanne Bell Experiment to Find the Focal Length and Power of a Diverging Lens Aim The aim of this experiment is to measure the focal length and power of a diverging lens. Since negative or diverging lenses do not form real images of real objects, an experimental virtual object will need to be set up for the diverging lens by using a converging lens. To do this, place a converging lens in front of the diverging lens. If the converging lens has a shorter focal length than the diverging lens, the two-lens combination will form a real image of a distant object. Figure 1 When the lenses of individual focal lengths f c and f D, are placed in contact, the effective focal length f of the combination is given by: Equation 1 The power of a lens is given by the equation: Equation 2 The total power of these two lenses is given by the equation: P tot...
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