Question

an object is 14cm in front of a concave mirror the image is 5.8cm behind the mirror.what is the focal length of the mirror?

Answer 1

u=-14cm
v=-5.8cm
f=?
1/f=1/v+1/u
1/f=1/5.8+1/14
1/f=14+5.8/14*5.8
1/f=19.8/81.2
f=4.10cm