Question

write the formula of mirror and lens for the relation of u v f​

Answer 1

Answer:

MIRROR FORMULA :

$\frac{1}{v}+\frac{1}{u}=\frac{1}{f}$

where :-

u = object distance

v = image distance

f = focal length

IN CONCAVE MIRROR :

u = - ve

v = + ve (virtual and erect) ; - ve (real and inverted)

f = - ve

IN CONVEX MIRROR :

u = - ve

v = - ve

f = + ve

LENS FORMULA :

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

where :-

u = object distance

v = image distance

f = focal length

IN CONCAVE LENS :

u = - ve

v = - ve (virtual and inverted)

f = - ve

IN CONVEX LENS :

u = - ve

v = + ve (real and erect) ; - ve (virtual and inverted)

f = + ve

I hope this helps ...........