Question

Determine the focal length of a convex lens by using two pins and formula f = uv/(u+v).​

Answer 1

Answer:

Determination of Focal Length of Convex Lens using u–v Method

The relation between u, v and f for a convex lens is,

v-1 + u-1 = f-1

Using the proper sign convention, u is negative, u negative, v and f are positive.

Comparing with y = mx + c, graph between v-1 & u-1 is negative with slope –1 and intercept f-1

Proceeding in the similar manner as discussed in case of a concave mirror the focal length of the lens can be calculated by measuring the coordinates of either of the points A, B and C.

Explanation:

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