Question

State lens formula. Also mention the meaning of all the symbols.

Answer 1

Hi friend.

Your lens formula is
$\frac{1}{f} = \frac{1 }{v} - \frac{1}{u}$

f refers to focal length.

u refers to Object distance

v refers to image distance in the lens.

As per the Cartesian Sign Convention,

In concave lens,
u,v,f are all negative as it diverging back.

In Convex lens,
u is negative and all others are positive.

u is negative because always object is placed behind the lens or in front of it.

Answer 2

✨✔️✔️ HERE IS YOUR ANSWER....

✔️ Relationship between object distance , image distance and the focal length is referred to as lens formula.

✔ ️$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$

✔️ • u :- object distance.
• v :- image distance.
• f :- focal length.

✨✔️✔️HOPE IT HELPS YOU...
✌❤✌