1
Question
If the radius of curvature of a convex mirror is 20 cm, calculate its focal length (in cm).
- 10
- 10
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Solution
The correct option is A 10
The focal length (f) is half of the radius of curvature (R).
Therefore, f = R/2
= 20/2 cm
= 10 cm
The focal length (f) is half of the radius of curvature (R).
Therefore, f = R/2
= 20/2 cm
= 10 cm
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