Optics Question 902

Question: A convex mirror of focal length f forms an image which is 1n times the object. The distance of the object from the mirror is

Options:

A) (n−1)f

B) (n−1n)f

C) (n+1n)f

D) (n+1)f

Show Answer

Answer:

Correct Answer: A

Solution:

m=+1n=−vu⇒v=−un .

By using mirror formula 1f=1−un+1u

⇒u=−(n−1)f

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