Question

In concave morror focal length is +ve or -ve

Answer 1

Answer:

-ve

Explanation:

The concave mirror focal length is -ve

Answer 2

Hey mate here's your answer..

In concave lens focal lenght is negative while in convex lens it's positive..

Lens formula..

1/f=1/v-1/u

Concave lens is for people who are suffering from myopia..(can't see far objects but can see nearer one)

Convex lens is for those who are suffering from hypermetropia..(can't see nearby objects but can see far one)

Hope you find it helpful!!

Any doubt ask in comment ❣❣