Error in focal length from object and image distances

1. A.
   1.02
2. B.
   0.85
3. C.
   1.70
4. D.
   0.51

Tap an option to check your answer.

1. A.
   $\frac{\Delta u}{u} + \frac{\Delta v}{v}$
2. B.
   $f^{2}\left\lbrack \frac{\Delta u}{u^{2}} + \frac{\Delta v}{v^{2}} \right\rbrack$
3. C.
   $2f\left\lbrack \frac{\Delta u}{u} + \frac{\Delta v}{v} \right\rbrack$
4. D.
   $f\left\lbrack \frac{\Delta u}{u} + \frac{\Delta v}{v} \right\rbrack$

Tap an option to check your answer.