What is a Complex Lens? Convex or Concave?

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A complex lens likely refers to a compound lens made up of multiple lens elements. When an object is positioned at the principal focus of a complex lens, no image is formed at all. The discussion raises questions about whether the type of lens, convex or concave, affects this outcome. The consensus suggests that the classification of the lens may not significantly impact the formation of the image. Understanding the nature of complex lenses is essential for grasping their optical behavior.
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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
 
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fatty005005 said:
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?
 
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