Question

A ray parallel to the principal axis, after refraction through a concave lens, appears to diverge from:

Options

• The principal focus on the same side

• The principal focus on the other side of the lens

• The optical centre

• The centre of curvature of the second surface

Answer 1

A ray parallel to the principal axis, after refraction through a concave lens, appears to diverge from the principal focus on the same side as the incident light. The concave lens diverges rays, so its focus is virtual.