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When Sunlight is Concentrated on a Piece of Paper by a Spherical Mirror Or Lens, Then a Hole Can Be Burnt in It. for Doing This, the Paper Must Be Placed at He Focus Of: (A) Either a Convex Mirror Or Convex Lens (B) Either a Concave Mirror Or Concave Lens (C) Either a Concave Mirror Or Convex Lens (D) Either a Convex Mirror Or Concave Lens - CBSE Class 10 - Science

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Question

When sunlight is concentrated on a piece of paper by a spherical mirror or lens, then a hole can be burnt in it. For doing this, the paper must be placed at he focus of:
(a) either a convex mirror or convex lens
(b) either a concave mirror or concave lens
(c) either a concave mirror or convex lens
(d) either a convex mirror or concave lens 

Solution

either a concave mirror or a convex lens

Both a concave mirror and a convex lens focus parallel light beams coming from a distant object onto the focus.

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Solution When Sunlight is Concentrated on a Piece of Paper by a Spherical Mirror Or Lens, Then a Hole Can Be Burnt in It. for Doing This, the Paper Must Be Placed at He Focus Of: (A) Either a Convex Mirror Or Convex Lens (B) Either a Concave Mirror Or Concave Lens (C) Either a Concave Mirror Or Convex Lens (D) Either a Convex Mirror Or Concave Lens Concept: Refraction of Light - Image Formation by Lenses - Concave Lens.
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