Easy
How will you identify a concave lens by touching it?
- AIt is thicker at the centre and thinner at the edges.
- BIt is thinner at the centre and thicker at the edges.
- CIt is equally thick throughout.
- DIt is rough at the centre and smooth at the edges.
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Similar Questions
$(a)$ What should be the position of the object,when a concave mirror is to be used $(i)$ as a shaving mirror,and $(ii)$ in torches producing a parallel beam of light? $(b)$ $A$ man standing in front of a mirror finds his image having a very small head and legs of normal size. What type of mirror is used in designing such a mirror?
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View SolutionHow many images are formed by two parallel mirrors?
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View SolutionGive one use of a concave lens.
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View Solution$A$ concave mirror can be used to obtain a parallel beam of light from a small lamp.
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View SolutionIn a plane mirror,the distance between the image and the mirror is the same as the distance between the object and the mirror.
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