Question

Write diagrams to show the refraction of parallel rays of light in (i) convex lens and (ii) concave lens.

Answer 1

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Answer 2

Write diagrams to show the refraction of parallel rays of light in (i) convex lens and (ii) concave lens.

Answers:

Convex Lens

Convex lens are basically thicker at the middle. The rays of the light which passes through the lens are brought closer. The convex lens are also called converging lens. When the parallel rays of light pass through the convex lens the refracted rays meet at one point. The point is known as principal focus.The distance between the principal focus and the lens centre is called the focal length.

Concave Lens

Concave lens are very much thinner at the centre. The rays of the light which will pass through the lens will diverge out. The concave lens are also called diverging lens. The image that is formed is virtual and it is small.