Question

where is the imagine located if the object is 30cm in front of convex mirror with a focal length of 20cm​

Answer 1

Answer:

using mirror formula

1/ v + 1/u = 1/f

v = - 30 cm(object is in the left side of the mirror)

f = 20 cm

1/v = 1/f - 1/u

1/v = 1/20 - 1/(-30)

1/v = 1/20 + 1/30

1/v = 3+2/60

1/v = 5/60

v = 60/5

v = 12 cm