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Course: Exploratorium > Unit 2
Lesson 5: Colored Shadows- Colored shadows: Introduction
- Build your own colored shadows: Materials & steps
- What's going on: Light travels in straight lines
- What’s going on: Human color perception
- Yellow and cyan challenge
- Yellow and cyan solution
- Further explorations with colored shadows
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Build your own colored shadows: Materials & steps
Here's everything you'll need to build your own colored shadows.
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RGB is they color scheme for computers and sometimes I use HSB for programming on KA. What is the difference between them?(4 votes)
RGB stands for "Red, Green, Blue" and uses varying values of the three colors (from 0 to 255 for each) to create just about any shade in the white-light color spectrum. HSB stands for "Hue, Saturation, Brightness" (sometimes also called luminosity), and provides an alternate way of determining color based on its primary color, how much of that color saturates a shade, and how bright it is. The HSB color method uses percentages rather than the 0-255 values, and is purported to provide more accuracy in color determination and selection.
Source: http://animation.about.com/od/flashanimationtutorials/qt/flash_rgbhsb.htm(8 votes)
RGB is one color scheme for computers the other is CMY, the shadows of RGB. Doesn't that make the two color triplets equivalent in what they can display?(2 votes)
Yes, they do have equivalent display ranges. So does RYB(the painting scheme) if you add neutral colors(white, black, and gray) to the mix.(4 votes)
- Are white walls alright to substitute for the foam core? And is it alright if the bulbs are farther from the wall? Or does it precisely have to be 3 ft?(2 votes)
anything white should do. and if the bulbs are farther than the wall shadows will just be farther apart to.(1 vote)
Is this a man or a lady?(1 vote)
How could I build this BIG scale in our preschool?(1 vote)
Would a white wall work to?(1 vote)
Video transcript
- [Voiceover] To do this experiment, you'll need three plug-in socket adapters and compact florescent lamps
in red, green, and blue. You can get all of these
at a hardware store. You'll need a pencil, a strip of paper, half an inch by 11 inches. You'll need a power strip. You'll need foam core. Ours happens to be 22 inches by 28 inches, and you'll want it to be white. You'll need a cardboard
box to tape to the back of the foam core to make it stand upright. And for tools, you'll
need a pair of scissors and a roll of duct tape. To build this experiment,
you're going to need to screw the bulbs in to
the plug in socket adapters. And then plug them in to the power strip. You're going to want
to do this in the order of red, then green, then blue. And when you're done, you turn them on. To mount the foam core to the
box to make it stand upright, the first thing you're going
to do is cut a couple pieces of duct tape, about four inches long. And then, you're going
to take the foam core, push the box up against it, and use the duct tape to attach the box to the foam core. You need the second
piece to keep the bottom of the foam core from rolling out away from the box. And there you have it. You'll need a table on which to put the bulbs and the screen. The screen should be at least three feet away from the bulbs. Turn on the bulbs, and we'll do the experiment.