Question

the radius of curvature of concave mirror is 10cm. what is position of image if size of image is 10 times size of object ​

Answer 1

Answer:

i think 20 is your answer

Answer 2

Given:

The radius of curvature of a concave mirror is 10cm and the size of the image is 10 times the size of the object ​

To Find:

The position of the image.

Solution:

According to the question,

Radius of curvature (R) = 10 cm

Focal length, f = R / 2 = (10/2) = -5 cm

Magnification, m = size of image / size of object = 10 (Given)

$m =\frac{-v}{u} = \frac{f}{f - u}$.............(i)

⇒ $10 = \frac{-5}{-5 -u}$

⇒ u = -4.5

Now, putting the values in equation ( ),we get,

$m = \frac{-v}{u}$

⇒ $10 = \frac{-v}{-4.5}$

⇒ v = 45 cm

Hence, the image is situated at a distance of 45 cm from the mirror.