Question

Height of image is 10cm and height of object is 2.5cm What will be magnification.. ✨


Gummie❤​

Answer 1

⤵️solution

Given that,

Distance u=−10cm

Height h=2.5cm

Radius of curvature R=30cm

We know that,

-f = R/2

- f = 30/2

f=−15cm

Now, using mirror’s formula

f/1 = v/1 + u/1

− 15/1= v/1 − 10/1

v/1 = − 15/1 + 10/ 1

v=30cm

Now, the magnification is

m= u/−v

m= 10/30

m=3

We know that,

m= h/h

3= h /2.5

h =7.5cm

Hence, the size of the image is 7.5