The very rainbowyness of this project really did lift my spirits and the very chunkyness of the yarn made the rainbow stripes grow satisfyingly fast. I deliberately went for a rainbow effect, I think I might have been subconsciously trying to counter balance the extreme drabness of the weather we've been having! It's rainy and grey, lets make yarn rainbows!! Unusually for me, I chose to order these colours into a repeating stripe (you know I usually go for random, so this was yet another new experience for me). There is enough yarn here to make two of these cushions, you only actually need 4 x 100g balls of chunky to make a 45cm cushion in this pattern. ♥ Raspberry ♥ Lipstick ♥ Fondant ♥ Camel ♥ Meadow ♥ Aspen ♥ Lavender ♥ Denim I've used Stylecraft Special Chunky yarn, worked on a 6mm hook, in eight colours as follows :: I also wanted to try using chunky yarn for the first time, so the combination of the new stitch and the new yarn was a whole new experience for me. Several other optical phenomena that appear as colored circles are haloes and coronas (around the light source) and glories (around the point directly opposite the light source).This cushion has been such a happy project to work on, a quick and spontaneous make which I used to test out my new Raindrops stitch pattern. Do not, however, be confused if you see small colored circles of light either around the sun (or moon) or around the point directly opposite the sun (or moon). Looking down from an airplane or a mountain, it is possible to see more of the circle, or even a complete circle. Standing on perfectly flat ground, the largest rainbow we can see is a half circle (when the sun is on the horizon behind us).
#Rainbow raindrops full
Usually we only see a small section of the full rainbow circle because the rest of it is blocked by the ground in front of us. In a large region of raindrops, the circular symmetry of the drops causes us to see the colors displayed in a circular band in the sky. In the case of a rainbow, there are many raindrops in the air, some at the right angle to send red light to our eye, some at the right angle to send blue light to our eye, and some at the right angle to send other colors to our eye. In fact, you can experience this by looking up close at a drop of water hanging from a flower or blade of grass with the sun behind you. If there really was only one raindrop, you would have to move your head up and down to see the colors change from red to blue. If you look carefully at the blue and red light rays exiting the lower left portion of the water drop in the figure, you might realize that your eye cannot usually see both red and blue from a single drop. The specific angle depends on the purity of the water and the exact wavelength being considered. The angle between the incoming ray of sunlight and the ray that has been refracted twice and reflected once is approximately 40 degrees for blue light and 42 deg for red light. When the reflected light passes back into the air, it refracts (bends) again, which causes the colors to separate even further. The diagram uses a red ray and a blue ray to illustrate how the long-wavelength and short-wavelength light is bent into different angles.Īt the back of the drop, some of the light is reflected (what the diagram does not show is that much of the light passes into the air and continues traveling to the right). Blue light is bent more than red light, with green and yellow in between.
Upon entering the drop, the light ray is refracted (or bent) into an angle that depends on wavelength (or color). The diagram illustrates what happens to a single ray of sunlight as it passes through a spherical water drop (actual raindrops are not exactly spherical, but the mechanism is still very similar). Passing white light from a distant source through a raindrop is one way to separate the colors. Sunlight contains the full spectrum of colors that are visible to human eyes, but when nearly equal amounts of all these colors are mixed together, the result is white (or nearly white) light. When sunlight encounters a drop of water in the atmosphere it can produce a colorful rainbow because the amount that light rays are bent as they pass in and out of the raindrop depends on the wavelength (or color) of the light.
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