What is a Complex Lens? Convex or Concave?

[fatty005005]

When an object is placed at the principle focus of a complex lens, then the image is
A) larger and inverted
B) smaller and inverted
C) the same size and inverted
D) not formed at all
Incorrect. Your answer=C, Correct answer=D

MY QUESTION: WHAT ON EARTH IS A COMPLEX LENS? CONVEX OR CONCAVE?
thanks

 

[Doc Al]

MY QUESTION: WHAT ON EARTH IS A COMPLEX LENS?

I suspect it means a compound lens: several lenses combined together.

CONVEX OR CONCAVE?

Does it matter?