Question

Which of the following lenses has at least one plane surface?

Answer 1

Answer;

Plano-convex lens

Explanation;

• Plano-convex lens has at least one plane surface
• Plano-convex lenses are types of lenses that have one spherical surface and one flat surface.
• These types of lenses are designed for infinite conjugate use or simple imaging in non-critical applications. The  lenses are ideal for all-purpose focusing elements.
• For example; they are ideal for beam expansion, light projection, or for expanding an optical system's focal length.

Answer 2

d. plano-convex lens