Question

An image, is formed at a distance of 10cm from the pole of convex mirror of focal length 80cm find the position of the object ​

Answer 1

Explanation:

Given that

u= -10 cm

f= 15 cm

Find out

We need to find v

Formula

We know the formula

1/f = 1/v + 1/u

Therefore, 1/v = 1/f – 1/u

Substituting the known values in the above equation we get,

1/v = 1/15 – (-1/10)

1/v= 1/15 + 1/10

1/v = (2 + 3)/30 (LCM)

Hence

v = 5/30

v = 6cm

The image is formed behind the mirror and it is virtual

Answer 2

Explanation:

we can find the position of image by calculating the image distance,v .

here , object distance, u=10cm

Image distance, v=?

And, focal length, f=80cm

Putting the value in the mirror formula:

1 + 1 = 1

_ _ _

v u f

1 + 1 = 1

_ _ _

v -10 80