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The focal length of a mirror is give by ...

The focal length of a mirror is give by `(1)/(f)=(1)/(u)+(1)/(v)`, where 'u' represents object distance, 'v' image distance and 'f' local length. The maximum relative error is

A

`(Delta f)/(f)=(Delta u)/(u)+(Delta v)/(v)`

B

`-(df)/(f^(2))=(-(du)/(u^(2)))+(-(dv)/(v^(2)))`

C

`(Delta f)/(f)=(Delta u)/(u)+(Delta v)/(v)+(Delta(u+v))/(u+v)`

D

`(Delta f)/(f)=(Delta u)/(u)+(Delta v)/(v)+(Delta u)/(u+v)+(Delta v)/(u+v)`

Text Solution

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The correct Answer is:
B, C
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