Homework Statement
Calculating focal lengths of lenses.
s = 144.7 ± 5.52 mm
s' = 86.0 + 0.71 mm
Homework EquationsFocal Length
f = (s)(s') / ( s + s' )
Adding/Subtracting two numbers with uncertainties
A + B ± root [ (±A)^2 + (±B)^2 ]
Multiplying/Dividing
AB ± root [ (±A/A)^2 + (±B/B)^2)...