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Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
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Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
A. zero
B. focus
C. 2 f
D. f/2
Correct Answer:
f/2
✔
Last Updated:
January 20, 2021