Types of spherical lenses: biconvex Plano-convex convex meniscus Biconcave Plano-concave concave meniscus The formation of these lenses may be understood from the figures below... B1王 Biconvex Plano- Comvex- Meniscus Plano- Biconcave convex concave concave 7Types of spherical lenses: biconvex Plano-convex convex meniscus Biconcave Plano-concave concave meniscus The formation of these lenses may be understood from the figures below… 7