If the focal length of a lens is expressed in meters then 1 Diopter i – McqOptions

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1.	If the focal length of a lens is expressed in meters then 1 Diopter is equal to
A.	0.5 m-1
B.	2 m-1
C.	1 m-1
D.	0.25 m-1
Answer» D. 0.25 m-1

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