Question

a 5cm object is placed in front of a concave mirror will radiu of curtavure of 20cm . determine the image height if the object distance is 15 cm​

Answer 1

Answer:

Formula: v1​+u1​=f1​

Given,

v1​+(−20)1​=151​

v1​=607​⇒v=760​

v=8.57≈8.6cm

The image is formed behind the mirror at a distance of 8.6 cm

m=$\frac{h1}{h2}=\frac{-u}{v}$

  =$\frac{h2}{5}=\frac{-8.57}{20}$

∴h2​=2.175 cm