The Enigmatic Color of the Sun

Is yellow the true color of the sun? Our sun emits a broad spectrum of radiation, including visible light, which is crucial for life on Earth. In the vacuum of space, the sun appears white because it emits light across all wavelengths fairly evenly. However, when this light enters our atmosphere, it encounters air molecules and particles that scatter shorter wavelengths—primarily blue light—more effectively than longer wavelengths like red and yellow.

color of the sun

Simultaneous Color Contrast Explained…

Consider a small, clear disc placed against a blue background. The disc may appear slightly yellow due to the influence of the blue light surrounding it. This visual effect is similar to how we perceive the sun against the blue sky.In essence, while the sun itself emits white light, our atmosphere alters its appearance, leading us to see it as yellowish or orangish at times.

Additionally, not all species perceive colors in the same way. Different animals have varying sensitivities to wavelengths of light. This means their experience of color and light can be quite different from ours.

For more fun facts about color perception and optical illusions, visit Archimedes Lab.

Sometimes Behave So Strangely…

Psychologist Diana Deutsch noticed something strange in 1995 while fine-tuning spoken commentary on a CD. The phrase “sometimes behave so strangely” sounded like a song when repeated on a loop. The phenomenon isn’t fully understood.

Deutsch’s illusion “Sometimes Behave So Strangely” experienced by the fifth graders of Atwater School, Shorewood, Wisconsin. Video created by their music teacher Walt Boyer.

Learn more: http://deutsch.ucsd.edu/psychology/pages.php?i=212

BLURRED FACES AND CONTRAST ADAPTATION

Do our eyes truly act as the gateway to the world, as poets suggest? Not quite. We see the world through tiny pupils that act as spy holes. Our brain is like a creative ‘camera obscura‘, constantly comparing differences between images received by each eye and individual elements within each image. This makes our eyes highly sensitive to contrasts in brightness, sharpness, and depth. Sometimes, our brain tries to correct what we see.

Try this experiment: Look at the blurry face below next to the sharp one for 20-30 seconds (staring at the fixation star between them), then quickly shift your gaze to the same scene further below. You’ll notice that the previously clear face now appears blurry while the previously blurry face appears clearer. This illusion, called contrast adaptation or contrast gain control, occurs because prolonged exposure to blurry images affects our visual acuity and sensitivity to contrast.

blurred faces and contrast adaptation
© Gianni A. Sarcone

Op Art Metal Bookmarks

As an artist, I enjoy including subliminal messages or figures in my work. My paintings, photographs and collages play on the foreground and background relationship of our visual perception and represent common or iconic faces the viewer has to rediscover.

In this magical bookmark of my creation, a portrait of M. L. King appears when held over a blank page or up to a light. From his famous words, we are reminded that, “Darkness cannot drive out darkness; only light can do that.” A neat gift available from Art of Play.

While in this one below, a portrait of Gandhi appears when held over a blank page or up to a light — a subtle reminder to read with intention and “Be the change you wish to see in the world.” Still available from my partner Art of Play.

Illusive Color Mixing

When your brain lies… There is NO yellow, nor red, nor green in the picture below! The only real colors are blue, cyan and magenta. Scientists and artists call these color induction effects “simultaneous color contrast” and “color assimilation”.

Concept taken from my book “Drawing Optical Illusions” (2010).
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Math-Magic Vanishing Space

Qaudrix puzzle 1

Inspired from the astrological tables, here is a new puzzle of my creation designed according to the ‘Golden Number Rules’, which is reflected in the proportion of each single piece of the game. Thanks to the balanced dimensions of its pieces, this puzzle acquires some intriguing magical properties!

This “math-magical” puzzle is composed of a tray in which the pieces are assembled.

Quadrix puzzle 2

Puzzle Quadrix (aka Quirinus), © 1992, G. Sarcone.

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Subliminal Faces

This series of works questions the many cognitive aspects of faces’ recognition. People often see hidden faces in things, clouds, landscapes, or in architectural structures… Finding the latent or virtual image hidden in the manifest image is a mental process related to the concept of the “lost object” used in psychoanalysis. As an artist, I enjoy including subliminal messages or figures in my work. My paintings, photographs and collages play on the foreground and background relationship of our visual perception and represent common or iconic faces the viewer has to rediscover.

The Master of Numbers
Collage – mixed media, 2006

Photomosaic portrait of Albert Einstein made with random photographs of numbers.
It is only when the viewer moves away from the image that the portrait of Einstein appears. It is the distance that creates and unveils the truth, because everything is relative as Einstein once said and everything depends on the context, the environment or the point of view.

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Op Art On Metal (2)

A visual surprise is hidden within this magical bookmark I created for my partner Art of Play. From one perspective, the grooves in the metal die-cut card seem to be an abstract radial design but place the pattern against a solid dark background and a familiar portrait emerges.

Can you guess who’s this female Mexican artist who once said: “Everything changes, everything moves, everything revolves, everything flies and goes away.”

Bookmark available from Art of Play.

Frida Kahlo
FK bookmark available from Art of Play.
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Op Art On Metal

Below are two neat optical illusion projects for which I was commissioned by “Art of Play”. From one perspective, the grooves in the metal die-cut bookmarks seem to be an abstract design but place the pattern against a solid clear or dark background and a familiar figure pops into view! These bookmarks are a sliver of wonder that hides between the pages to guard your place in any story.

Everything is relative with this magical bookmark of my creation depicting the famous theoretical physicist. Engraved with one of Einstein’s most famous quotations: “The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. He to whom the emotion is a stranger, who can no longer pause to wonder and stand wrapped in awe, is as good as dead; his eyes are closed.”

Einstein bookmark – 1
Available from Art of Play: https://www.artofplay.com/products/einstein-bookmark
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