Question

if u=25cm, and v=37.5cm, the focal length of the concave mirror is(observe the sign convention)

Answer 1

Answer:

As we know,

u=25

v=37.5

Focal length (f)= ?

we know that,

1/v - 1/u = 1/f

so,

1/37.5 - 1/25 = 1/f

(Then solve this equation.)