Synthesis and Analysis of Color Concept

Demonstrations in Synthesis and Analysis of Color

Colored shadows on a projection screen showing three overlapping circles in yellow, cyan, and magenta, with secondary overlaps in red, green, and blue, and a dark center where all three shadows overlap
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Primary Color Floodlights

Demonstrates additive color mixing using red, green, and blue floodlights. Students observe that overlapping primary-colored lights produce secondary colors (cyan, magenta, yellow) and white, contrasting with the subtractive mixing they …
Two flood lamps with reflective metal housings aimed at a white board, with a circular barrier held on a stick creating overlapping blue and red-orange colored shadows on the screen
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Colored Shadows

Students observe that light travels in straight lines by blocking one of two colored light sources and predicting the resulting shadow colors. The demo builds from simple ray tracing to …
Long-exposure photo of the word 'light' written in cursive with the Rav'n light, showing continuous RGB-striped trails with no gaps between colors

Tri-Color LED Color Mixing

Tri-color LEDs that appear white when stationary reveal separated red, green, and blue pulses when swung rapidly through the air. Students see that white light can be synthesized from three …
Projected slit with red, green, and blue color filter sections separated by white gaps, with diffracted rainbow spectra visible on either side against a dark background
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Color Spectra

Shows how a diffraction grating decomposes white light into its spectrum, and how color filters selectively transmit only certain wavelengths. Demonstrates that filters subtract wavelengths from white light rather than …
Three overlapping projected color squares — red, green, and blue — on a dark background, with yellow, magenta, and cyan visible at pairwise overlaps and near-white in the central region where all three combine
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Color Filters

Three overhead projectors with red, green, and blue filters produce overlapping colored squares, demonstrating additive color mixing. Students see secondary colors at pairwise overlaps and white where all three combine.
Three overlapping circular shadows on a cyan background, showing yellow, red-orange, blue-lavender, green, cyan, and black regions, with a circular barrier on a stand at right
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Red Without Red

Demonstrates color constancy: the brain's assumption about ambient illumination causes a region lit by only white light to appear vividly red. Students see that perceived color depends on context, not …
Chrome floor fan with wire cage, stationary, showing three metal blades painted green, blue, and red
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Fan Blade Color Mixing

Demonstrates additive color mixing: three fan blades painted red, green, and blue blend to white when spinning at full speed. A strobe light freezes the blades to reveal individual colors, …
Disassembled LCD projector optical assembly on black frame, with white light entering from the left and separated color beams (yellow, blue, green) visible along different pathways through dichroic mirrors and lenses; a hand holds a light source at the input
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Color Separation

Dichroic mirrors from a disassembled LCD projector separate white light into red, green, and blue pathways, then recombine them into white light through a prism assembly. Blocking individual color pathways …
Setup with LED spotlight on wooden platform at left, circular mask on ring stand at center, optical cable light source at right, and projection screen showing a cyan shadow (left), yellow shadow (right), and dark overlap where both lights are blocked

Colored Shadow Illusion

Demonstrates that color perception involves neural processing, not just physics. Superimposed white and colored lights create two shadows: one in the color of the colored source, and one that appears …
Three dichroic filters in clear slide mounts resting on cloth pouches. Each filter shows two colors: blue/yellow, orange/cyan, and green/magenta (reflected above, transmitted below).
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Thin Film Reflection and Transmission

Demonstrates thin-film interference using dichroic filters that selectively reflect and transmit complementary colors. Individual filters reflect primary colors and transmit secondaries; combined filters reverse this, and all three together act …
Under amber sodium light: color cube with indistinguishable vertices, three cutting boards all appearing the same shade, colored markers looking identical, and two photographs that both appear monochrome
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Colors in Monochromatic Light

Under monochromatic sodium light (589 nm), most colored objects become indistinguishable -- they appear as shades of yellow and dark gray. Students discover that color is not an intrinsic property …