Question

8. Find the position and nature of the image of an object of height 3cm when placed 60 cm from a mirror of focal length 15 cm. When the mirror is (a) concave (b) convex.

Answer 1

Explanation:

from mirror formula

1/f=1/v+1/u

f=15cm

u=60cm

1.cocave f=-f

f=-15

1/v=-1/15-1/60

1/v=-1/12

v=-12cm

m=-v/u

m=12/60

image is real and dimnished

2.convex

f=+ve

1/v=1/15-1/60

1/v=1/20

v=20cm

m=-20/60

real an inverted image

Answer 2

Answer:

For convex = position=v=+12cm

Image size=hi=0.6 cm

Explanation:

Thank you