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Question
Which of the following can make a parallel beam of light when light from a bulb falls on it?
Options
concave mirror as well as concave lens
convex mirror as well as convex lens
concave mirror as well as convex lens
convex mirror as well as concave lens
MCQ
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Solution
Concave mirror as well as convex lens.
Explanation:
When a light source is placed at the principal focus of both a concave mirror and a convex lens, the diverging rays strike the surface and refract or reflect out as a parallel beam.
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