The radius of curvature and focal length of a concave mirror are
A. positive
B. one is positive and other is negative
C. negative
D. none of these.
Answer:C
The radius of curvature and focal length of a concave mirror are
A. positive B. one is positive and other is negative C. negative D. none of these.
Explanation: Both are calculated against the direction of light/ it is Cartesian sign convention.