BPSC (Bihar PCS) 2025 · Question 74 of 145

The focal distance of a plane mirror is:

Miscellaneous

A-1 cm
B+1 cm
C2 cm
DInfinityCorrect

Answer: D. Infinity

Explanation

A plane mirror has an infinite focal distance. This is because the focal point of a plane mirror is considered to be at an infinite distance, as the reflected rays from a plane mirror never actually converge or diverge.

Source: 71st BPSC CCE Prelims 2025 (Set H)

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