Which of the following can be used to burn a small piece of paper with the help of sunlight?

Concave lens

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Convex lens

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Concave mirror

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Convex mirror

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Solution

The correct options are
B
Convex lens

C
Concave mirror

To burn something we would require to concentrate the rays over a small area. A convex lens is converging, so it can be appllicable for the job. Secondly, a concave mirror is also converging so we can use that as well. Look at the diagrams to get an idea.

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Similar questions

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 the 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

Q. Which of the following can make a parallel beam of light when light from a bulb falls on it?

(a) concave mirror as well as concave lens
(b) convex mirror as well as convex lens
(c) concave mirror as well as convex lens
(d) convex mirror as well as concave lens

Question 4

You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either

(a) concave mirror or convex mirror.

(b) concave mirror or convex lens.

(d) concave lens or convex lens.

Which of the following can make a parallel beam (a) concave mirror as well as concave lens (b) convex mirror as well as convex lens (c) concave mirror as well as convex lens (d) convex mirror as well as concave lens

Question 7

You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from

(a) both concave lens and convex lens.

(b) both concave mirror and convex mirror.

(d) Both convex mirror and concave lens.

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