Question

an object placed of height 2 cm is placed in front of a convex mirror whose focal length is 15 cm . calculate height of image

Answer 1

Answer:

hellooo...

HEIGHT WILL BE = -3cm

Explanation:

Size of object (ho) =2cm

Size of the object ( hi) =?

Focal length f=−12cm

Object distance u=−20cm

Image distance v=?

Using mirror formula

1/f = 1/v+ 1/u

1/-12 = 1/V + 1/-20

1/V= -5+3 /60

1/V= -2/60

1/V= -1/ 30

V = - 30

Magnification (M)

= hi / ho

= -V/U

= 30/-20

= -1. 5

hi= -1.5×2

= -3cm

Image will be real, inverted and magnified.

HOPE IT HELPS❤