Question

an object is kept at a distance of 15 cm from a concave mirror whose radius of curvature is 30 cm .What is the position of the image?​

Answer 1

Given :-

Object Distance = u = -15 cm

Radius of Curvature = R = -30 cm

As we know that,

f = R/2

f = -30/2

f = -15 cm

We are required to find the position of image.

By Mirror Formula,

1/v + 1/u = 1/f

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

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

1/v = 0/15

v = 15/0

v = ∞

Hence,

Image will be formed at infinity.

Answer 2

Answer:

Given :-

Object Distance = u = -15 cm

Radius of Curvature = R = -30 cm

As we know that,

f = R/2

f = -30/2

f = -15 cm

We are required to find the position of image.

By Mirror Formula,

1/v + 1/u = 1/f

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

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

1/v = 0/15

v = 15/0

v = ∞

Hence,

Image will be formed at infinity.