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My point is that you have imposed a theory laden burden upon your students.
You have associated the phrase "real images" with "lenses", and "patterns
of light" with "pin holes". I consider the latter to be what is called "a
leading question" in juris prudence. My version, if properly spelled, is a
question which leads in the other direction by reversing the terminology.
One could now enhance this experience by successive applications of Vaseline
to the lens until its light patterns become less readily interpretable than
the image formed by the pinhole camera.