Question

How to find the focal length of a convex lens by distant object method and U-V method??​

Answer 1

We can use the lens formulae

1/v-1/u=1/f

Where u= object distance.
v= image distance & f=focal length.

Object distance is measured in negative.
Image distance is measured as positive in convex lens and negative in concave lens.
And focal length is positive for convex lens and negative for concave lens.

Answer 2

We can use the lens formulae

1/v-1/u=1/f

Where u= object distance.

v= image distance & f=focal length.

Object distance is measured in negative.

Image distance is measured as positive in convex lens and negative in concave lens.

And focal length is positive for convex lens and negative for concave lens.

Click to let others know, how helpful is