Question

focal length(f) is equals to 5, object distance(u) is equals to 15 , what is the magnification(m) of the object​

Answer 1

Answer:

1/f=1/v+1/u

1/5=1/v+1/15

1/v=1/5-1/15

1/v=3-1/15

1/v=2/15

1/v=1/7.5

v=7.5

m =v/u

m=7.5/5

m=1.5