Question

Write down the equation connecting the object distance image distance and focal length of lenses.​

Answer 1

$\large\tt\underline {\underline {Answer}}$

Formula for a lens connecting image distance (v), object distance (u) and the focal length (f) is:

1/v - 1/u = 1/f

This is the lens formula. The lens formula has a minus sign (-) between 1/v and 1/u whereas the mirror formula has a plus sign (+) between 1/v and 1/u.

Mirror formula:

1/v + 1/u = 1/f

Answer 2

Answer:

Formula for a lens connecting image distance (v), object distance (u) and the focal length (f) is:

1/v - 1/u = 1/f

This is the lens formula. The lens formula has a minus sign (-) between 1/v and 1/u whereas the mirror formula has a plus sign (+) between 1/v and 1/u.

Mirror formula:

1/v + 1/u = 1/f

Explanation:

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