an object of height 1 cm is placed in front of a concave mirror of focal length 10 cm such that a virtual image is formed if the height of the image is 3 cm find the object distance
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Answer:
Object distance u=−36 cm
Focal length of concave mirror f=−12 cm
Using mirror formula : v1 + u1 = f1
Or
v1 + −36 = −12
1⟹ v=−18 cm
Magnification = ho/hi = u/−v
Or
hi =(−18)
⟹ hi =−18 cm
Image formed is real and inverted
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