CBSE Class 10 Answered
Which type of lens is used in projector? convex or concave.
Asked by Tanmay k | 08 Jan, 2013, 03:40: PM
Expert Answer
A Fresnel lens is used in overhead projectors. It is flat on one side, has grooves on the other side, and has the same thickness across the entire length of the lens.
Answered by | 08 Jan, 2013, 05:12: PM
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