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