Convex / Concave, it all depends on your point of view!
Although the plates are the same, in the second picture, the indents of the egg plate look more like convex domes rather than concave indents.
Convex / Concave
Curiosities
Insegno Arcani
My name’s anagram (by Dario Uri): Gianni Sarcone → Insegno Arcani (Italian for “I reveal / teach mysteries”)
Perpetual Motion
Is this a real perpetual motion machine?
Obviously not… The closest thing to a “perpetual motion machine” is the Beverly clock whose mechanism is driven by variations in atmospheric pressure, and by daily temperature variations.
Illusive Color Radial Beams
“Deep Blue”, the yellowish rays you see in this picture are a construct of your brain. My op art work is available as prints from Saatchi Art gallery.
Color Luminance Sensibility
Do the light gray triangular shapes in the diagram below have the same hue and brightness?
Scintillating Starburst: Seeing rays that aren’t there…
This is one of my oldest illusions I created in the 90s. In the picture you may see ghostlike dark radial beams. This illusion is a variant of the Herman’s scintillating grid illusion. I designed this illusion just by turning 45 degrees the Herman grid and then by applying a polar transformation.
Dalí’s Living Skull
Salvador Dalí : Sept corps nus et un crâne, 1951 (Human skull consisting of seven naked women).
Often symbols of MORTALITY (or some romantic notion of immortality – as the belief that a spiritual part of a person survives death) and POWER, skulls have been employed in human rituals and art since the dawn of humanity: from the ancient animal skulls in Paleolithic burial sites, to the curlicued cattle skulls that haunt Georgia O’Keeffe’s canvasses. Skulls cannot be assumed to be only a mere symbol of death, they are also used in initiation rituals as a symbol of REBIRTH, symbolizing the ‘sephirah daath’ (סְפִירָה – sephirah, “enumeration” in Hebrew) on the cabalistic tree of life, the gateway to a higher awareness only achievable through spiritual death and rebirth.
Illusion of Color
Look at the colored rings from a distance. Then decide which ones have YELLOW inner circles, and which ones have BLUE inner circles.
A simple real life illusion: the transparent knife!
Take a look at this photo — it almost looks like a “transparent” or “camouflaged” knife! I snapped it years ago at a magician’s party. The trick here is all about specular reflections. It’s a simple illusion, but surprisingly effective. When you place a knife blade between the tines of a fork, it reflects nearby objects, making the blade seem almost invisible.
Cool Physics (Tensegrity)
This table is sturdy and stable. And yes, the chains are ordinary chains. Here is the tutorial that explains how to create such a miracle.
Here is an animated example:
