Chapter No. 7. Lenses,
What are the difference between concave lens and convex lens?
Concave Lens
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Convex Lens
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It is called diverging lens.
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It is called converging lens.
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This lens is thinner in the centre than at its edges.
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This lens is thicker at the centre than at its edges.
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The principal focus is virtual.
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The principal focus is virtual.
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The focal length is negative.
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The focal length is positive.
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This lens is used to correct myopia.
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This lens is used to correct hypermetropia.
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