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Per NCERT, if a CONVEX MIRROR has R = 3.00 m, what is its FOCAL LENGTH (with sign)?
A+1.50 m (convex mirror focal length is positive, F behind the mirror)
B−1.50 m
C−3.00 m
D+3.00 m
Answer & Solution
Correct answer: A. +1.50 m (convex mirror focal length is positive, F behind the mirror)
Per NCERT Example 9.1, convex mirror R = +3.00 m, so f = +R/2 = +1.50 m.
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