The Chamber of Secrets incident occurred during Harry Potter's second year at school.
During that incident, Hermione Granger saw the Basilisk through a mirror. Justin Finch-Fletchley saw it through his glasses, and there was also that boy who loved chasing Harry Potter around with a camera—he saw it through his camera. It was precisely because they had not looked directly into the Basilisk's eyes that they did not die outright like Moaning Myrtle.
The difference between a mirror and eyeglass lenses lay in the coating on the back. Whether colorless glass or water, both had high light transmission rates, with only a small amount of light reflected. But when light struck the mercury coating of a mirror, it was reflected back. That raised a question: was any light lost in the process?
Fresnel had gotten "stuck" here. Georgiana and Fargeon could not help him either. All they could do was make sure he did not forget to eat.
As for the experiment to recreate the Prussian "illusionist" magic trick, he had completely forgotten about it.
Georgiana believed that lifelike "Frederick the Great" was not a ghost, but something like a Chocolate Frog Card. The Albus Dumbledore on the card looked three-dimensional as well.
Yet the Dumbledore on the card had nothing to do with the real man. How could he possibly have time to appear whenever children unwrapped Chocolate Frogs and got his card?
That "Shadow" had nothing to do with the real man either. It was like standing before a mirror and seeing one's reflection, then placing another mirror facing it to form a "corridor" full of Dumbledores. But that corridor did not truly exist; it was more like the effect of perspective in a painting.
According to Kant's Critique of Pure Reason, the concept of space arose from