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Question
Which one of the mirror below (in the absence of the other mirrors) would cause light from a distant source on the left side of the paper to be focussed to a point that is closest to the mirror?
Which one of the mirror below (in the absence of the other mirrors) would cause light from a distant source on the left side of the paper to be focussed to a point that is closest to the mirror?
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Solution
The correct option is D D
As per given information in the question, A light source is kept left of the mirror. Mirror 'A' will not reflect rays because its polished surface is kept toward light source. Mirror 'B' is plane mirror so it will not focus at any point. or you can say, it will focus at infinite distance from mirror.Whereas Mirror 'C' and 'D' are concave mirror facing towards light source. these mirror will focus at a distance R2 from its pole. because radius of curvature of Mirror 'D' is small so it will focus at closed point in the given groups of mirrors.
As per given information in the question, A light source is kept left of the mirror.
Mirror 'A' will not reflect rays because its polished surface is kept toward light source.
Mirror 'B' is plane mirror so it will not focus at any point. or you can say, it will focus at infinite distance from mirror.
Whereas Mirror 'C' and 'D' are concave mirror facing towards light source. these mirror will focus at a distance R2 from its pole.
because radius of curvature of Mirror 'D' is small so it will focus at closed point in the given groups of mirrors.
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