– The equivalent focal length of two thin lenses in contact is ….
A. f = f1 + f2
B. f = f1 – f2
C. 1/f = 1/f1 +1/f2
D. 1/f = 1/f1 – 1/f2
Answer:C
– The equivalent focal length of two thin lenses in contact is ….
A. f = f1 + f2 B. f = f1 – f2 C. 1/f = 1/f1 +1/f2 D. 1/f = 1/f1 – 1/f2