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Question

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State two differences between a convex and a concave lens.

Solution

(i) Convex lens is thicker in the middle while concave lens is thinner in the middle.

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(ii) A convex lens converges the light ray falling on it, while a concave lens diverges the light ray falling on it.

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Some More Questions From Light Chapter

What is a virtual image? Give one situation where a virtual image is formed.

State two differences between a convex and a concave lens.

Give one use each of a concave and a convex mirror.

Which type of mirror can form a real image?

Which type of lens forms always a virtual image?

A virtual image larger than the object can be produced by a
(i) concave lens
(ii) concave mirror
(iii) convex mirror
(iv) plane mirror

David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be
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(ii) 2 m/s
(iii) 4 m/s
(iv) 8 m/s

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