1.

The focal length of a cocave mirror is f and the distane from the object to the principal focus is x. The ratio of the size of the image to the size of the object is :

Answer»

`(F + x)/(f)`
`(f)/(x)`
`SQRT((f)/(x))`
`(f^(2))/(x^(2))`

Solution :(B) `(I)/(O)=(f)/(f-u),"where" u=f+xtherefore(I)/(O)=-(f)/(x).`


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