Question

how do u find the focal length of lens expirimentally.​

Answer 1

Answer:

To find the focal length of a lens experimentally:

Explanation:

Depends on the kind of lens:

Convex: focus sunlight/white light through it on your hand(not if you are focusing sunlight, may cause injuries) or any other object OR see through it and the objects will appear farther than they actually are(thus, objects look larger to a normal eye).

Concave: pass sunlight/white light through it an the light rays will diverge OR see through it and the objects will appear nearer than they actually are(thus, objects look smaller to a normal eye).

hope this helps:)