Multiple Choice
Two thin lenses (focal lengths f1 and f2) are in contact.Their equivalent focal length is:
A) f1 + f2
B) f1f2/(f1 + f2)
C) 1/f1 + 1/f2
D) f1 - f2
E) f1(f1 - f2) /f2
Correct Answer:
Verified
Correct Answer:
Verified
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