Question

1. In u-v method , the calculated focal lengths in different set of observation are 14.8 cm , 14.9 cm , 15.2 cm , and 15.3 cm respectively . what is the focal length of convex lens ?

Answer 1

Answer:

focal length=15.05 cm

Explanation:

See observations are given just find average of the observations.

focal length= (14.8+14.9+15.2+15.3)/4

=15.05 cm

so this will the focal length of the given lens as per the experiment.

Answer 2

Explanation:

formula for focal lenght

The lens equation says 1/f = 1/Do + 1/Di, where f is the focal length of the lens, Do is the distance from the object to the lens and Di is the distance from the lens to the in-focus projected image

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