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BPSC Prelims 2025 General 📅 13 Sep, 2025

The focal distance of a plane mirror is

A
+1 cm
B
-1 cm
C
2 cm
D
Infinity
Result Summary
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APEDIA

BPSC Prelims
2025 • 13 Sep, 2025 • General
The focal distance of a plane mirror is
Correct Answer
Infinity
Radius of Curvature: A plane mirror is part of a sphere with an infinite radius. Focal Length: Since f = R/2, if R is infinity, then f is also infinity. Meani......
💡 Analysis & Explanation
Radius of Curvature
A plane mirror is part of a sphere with an infinite radius.
Focal Length
Since f = R/2, if R is infinity, then f is also infinity.
Meaning
Parallel rays hitting a plane mirror remain parallel (meet at infinity).