Question

3. Find the size, nature and position of image formed when an object of size 1 cm is placed at a
distance of 15 cm from concave mirror of focal length 10 cm.​

Answer 1

Answer:

Explanation:

V= ?

U= -15 cm

F= -10 cm

H= 1 cm

We know,

1/v + 1/u = 1/f

Putting the values,

1/ v + 1/-15 = 1/-10

1/v - 1/15= 1/-10

1/v = -1/10 -1/15

1/v = (-3-2)/30

1/ v = -5/30

1/v = -1/6

V = -6 cm

We also know,

M = h'/h = - v/u

H' = - vh/u

H' = -(-6×1)/-15

H' = -6/15

H' = -0.4 cm

So, image is real, inverted and diminished.