PB1.Q4iii

What type of lens is formed by the combination of a glass slab and two prisms as shown in the diagram?

• Convex Lens

• Concave Lens

• Plano-convex Lens

• Plano-concave Lens

What is the line XX' called in the context of the lens?

• Focal axis

• Principal axis

• Optical axis

• Center line

How will the incident ray AB travel after passing through the concave lens?

• It will converge towards the principal axis.

• It will diverge away from the principal axis.

• It will pass through the lens undeviated.

• It will reflect back along the same path.

When a ray parallel to the principal axis passes through a concave lens, it appears to diverge from which point?

• The center of curvature

• The principal focus

• The optical center

• The pole of the lens

If the emergent ray appears to come from a point on the principal axis (XX'), what is that point labeled as F called?

• Center of Curvature

• Principal Focus

• Optical Center

• Pole

For a concave lens, is the principal focus (F) real or virtual?

• Real

• Virtual

• Both real and virtual depending on the object's position

• Neither real nor virtual

After passing through a concave lens, where will a ray parallel to the principal axis appear to diverge from?

• 2F

• F

• Between F and 2F

• Infinity

The point F for the given lens will lie on:

• Left side of the lens

• Right side of the lens

• At the optical center

• At infinity