Calculation: ionXgE - 1

1

/ F

=
(

n1

/ n2

-1)* (

1

/ R1

+

1

/ R2

)

1

/ F

= (

n1

/ n2

-1)* (

1

/ R1

+

1

/ R2

)$$\frac{1}{F}$$ = $$(\frac{n1}{n2}-1)\cdot (\frac{1}{R1}+\frac{1}{R2})$$

1

/ F

=

n1

/ R1/ n2

-

1

/ R1

+

n1

/ R2/ n2

-

1

/ R2

$$\frac{1}{F}$$ = $$\frac{n1}{R1\cdot n2}-\frac{1}{R1}+\frac{n1}{R2\cdot n2}-\frac{1}{R2}$$

F =

1

/ (

n1

/ R1/ n2

-

1

/ R1

+

n1

/ R2/ n2

-

1

/ R2

)

$$F$$ = $$\frac{1}{\frac{n1}{R1\cdot n2}-\frac{1}{R1}+\frac{n1}{R2\cdot n2}-\frac{1}{R2}}$$