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Lens and Its types.

Debraj Paul

27/01/2017 0 0 View Comments

A lens is a piece of transparent glass bounded by two spherical surfaces. It is of two main types.

Concave Lens: A lens having both of its surfaces curved inwards is called as a concave lens. It is thin in the middle and thicker at the edges. It is also called as a diverging lens as it diverges a parallel beam of light rays incident on it.

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