Determining the Focal Length of a Convex Lens Experiment

Record the result in. A lens of short focal length produces more deviation of light than that of a lens of larger focal length.

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Measure the focal length from the center of the convex lens to the focal point.

. Precisely focus the image of the object on the wall or screen until a sharp image is. So the power of a lens is defined as the reciprocal of its focal length. Therefore there are two positions of a lens.

Fix the convex lens in the holder. To determine the focal length of the convex lensCheck out more video on. If two lenses of fecal lengths f 1 and f 2 are kept in contact the focal length F of the.

Conclusion The objective of this experiment is to determine the focal length of a convex lens using different locations of the object and graphical method. It can be seen that it has two. 2 The place where the five refracted rays cross each other is the focal point of the lens.

Use the lens to focus an object like a tree on a white screen or a wall. For a thin double convex lensrefractionacts to focus all parallel rays to a point referred to as the principal focal point. Focal Length of Convex LensB11 Lab Report Objectives of the experiment.

To determine the focal length of a spherical convex lens by Lens formula method by Lens replacement. The distance from the lens to that point is the principal. Determine the focal length of a concave lens by combining it with a suitable convex lens.

The experimental setup is simple two convex lenses of equal focal lengths are positioned at a distance d and by measuring the back focal length of the two-lens system the. The lens equation has been. The experiment is repeated by increasing the values ofu in steps of 5 cm starting from a convenient value less than 2f so that at least two readings are obtained with valuesof u.

Also the sum of object and image distance is greater than or equal to 4 times the focal length of the lens when real images are formed on a screen.

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