In the mirror formula, `(1)/(f)=(1)/(v)+1/u,f` does not change when u is changed.

What is f in mirror formula (1)/(u)+(1)/(v)=(1)/(f) ?

Derive the lens formula 1/f=1/v-1/u for a convex lens.

The focal length of a less is given by the formula (1)/(f)=(1)/(u)+(1)/(v) . Make f as the subject of the formula. if u=20cm and v=30, then find f. The following steps are involved in solving the above problem. Arrange them in sequential order. (A) Given (1)/(f)=(1)/(u)+(1)/(v) (B) rArr f=(uv)/(u+v) (C) f=(20xx30)/(20+30)=(600)/(50)=12 cm. (D) rArr (1)/(f)=(v+u)/(uv)

State mirror formula. How does 'f' change when object distance 'u' from the mirror is changed?