A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be :
A. Both concave.
B. Both convex.
C. the mirror is concave and the lens is convex.
D. the mirror is convex, but the lens is concave.
Answer:A
A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be :
A. Both concave. B. Both convex. C. the mirror is concave and the lens is convex. D. the mirror is convex, but the lens is concave.