According to the thin lens formula, which one of the following is true regarding the focal length of the lens?
A. f is positive for concave lens
B. f is negative for convex lens
C. f is positive for a diverging lens
D. f is negative for concave lens
Answer:D
According to the thin lens formula, which one of the following is true regarding the focal length of the lens?
A. f is positive for concave lens B. f is negative for convex lens C. f is positive for a diverging lens D. f is negative for concave lens