Question

an object 2 cm height is held near a concave mirror of image of magnification 20 how tall will be the image​

Answer 1

Answer:

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Answer 2

Size of object  ho=2cm

Size of the object  hi=?

Focal length  f=−12cm

Object distance  u=−20cm

Image distance  v=?

Using mirror formula

f1=v1+u1

−121=v1+−201

v1=60−5+3

v=−30cm

Magnification (M)=hohi=u−v=−2030=−1.5

hi=−1.5×2=−3cm

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