Question

Define convex lens and concave lens from their shapes

Answer 1

convex lens is also called a double convex lens.
as the name defines, it has two convex surfaces on either sides.
its surfaces are bulged out.
concave lens is also called double concave lens.
as the name defines, it has two concave surface on either sides.
its surfaces are bulged in

Answer 2

Heya buddy..!✌️
Here is ur answer..!✔️

$\textbf{Convex \:Lens}$ :
The type of lens which is bulged outwards from both sides is known as a biconvex lens, or simply a Convex lens. This lens forms images which are slightly bigger than the object.

$\textbf{Concave\: Lens}$ :
The type of lens which has a dent/depression inwards is known as biconcave lens, or sometimes just a Concave lens. This lens forms images which are slightly smaller that the original object.

Hope this much is satisfactory....!⭐
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