A + 1.9 lens has a focal length of 25 mm. The diameter of lens is abou – McqOptions

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1.	A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
A.	13 mm
B.	1.3 mm
C.	130 mm
D.	none of the above
Answer» B. 1.3 mm

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