which of the following can make a parrelal beam
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Which of the following can make a parallel beam of light when light from a point source is incident on it? Explanation: When a point light source is placed at the focus of concave mirror then it all light rays after reflection through mirror will become parallel to the principal axis.
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When a point light source is placed at the focus of concave mirror then it all light rays after reflection through mirror will become parallel to the principal axis.
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