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  • If x and y be the distances of the object and image formed by a concave mirror from its focus and f be the focal length thenOption: 1 <img alt="\math

If x and y be the distances of the object and image formed by a concave mirror from its focus and f be the focal length then

Option: 1

\mathrm{\quad x f=y^2 }


Option: 2

\mathrm{\quad x y=f^2 }


Option: 3

\mathrm{\quad x / y=f }


Option: 4

\mathrm{x / y=f^2}


Answers (1)

best_answer

According to Newton's formula  \mathrm{x y=f^2}
Note that  \mathrm{m=\frac{f}{f-u}=\frac{f-v}{f}}

 or  \mathrm{\frac{f}{x}=\frac{y}{x} \quad \Rightarrow \quad x y=f^2}.
 

Posted by

rishi.raj

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