Identify the Lens Maker s Formula. – McqOptions

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1.	Identify the Lens Maker s Formula.
A.	f=( -1) ( ( frac {1}{R_1} frac {1}{R_2} ) )
B.	( frac {1}{f} )=( -1) ( ( frac {1}{R_1} frac {1}{R_2} ) )
C.	( frac {1}{f} )=( +1) ( ( frac {1}{R_1} frac {1}{R_2} ) )
D.	( frac {1}{f} )=( -1) ( ( frac {1}{R_1} + frac {1}{R_2} ) )
Answer» C. ( frac {1}{f} )=( +1) ( ( frac {1}{R_1} frac {1}{R_2} ) )

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