Effect of a Water Droplet on a Rainbow

Rainbow Formation Isaac Newton discovered that white light consists of visible light of all wavelengths. White light is a mixture of all colors in the spectrum of red, orange, yellow, green, blue, indigo, purple. Blocking white light allows you to see various components. Glass prisms can be used to separate white light into various wavelengths. This splitting occurs because each color of white light has a different refractive index. Therefore, different colors react differently to glass.

How to make a rainbow Water drops in the air behave like a prism, separating the color of the sun and forming a spectrum called a rainbow. To see the rainbow, you must stand in the sun behind you. Sunlight illuminates water drops in the air, bends as it moves from the air into the water, reflects water droplets from the side, and when it exists it turns again and separates the sunlight into the color of the spectrum. In this activity, students observe white light that passes through the prism and separates into chromatograms. They will also establish a relationship between the light passing through the prism and how the rainbow is formed. As with any other activity, the time you spend on this event is up to you. However, we recommend that you complete the activity step by step. If you use this activity and its accompanying extensions as a bounce point, you can use the theme "Adventure" as the basis for the whole learning unit.

Mist is cousin of rainbow. Fireflies formed from the sun appear in millions of small droplets that make up the fog. Since one million raindrops are needed to make one raindrop, the droplet is too small to refract enough to create a rainbow color. Therefore, smog glows bright white, but it is only for a short time. For that color, smog is also known as Ghost Rainbow, White Rainbow or Cloud Bow.

Sometimes you can see another darker secondary rainbow on the main rainbow. The main rainbow is caused by reflection of water droplets. A secondary rainbow is caused by a second reflection inside the droplet. This will "re-reflect" the light that emits the droplet at another angle (50 ° instead of 42 ° of the red main bow). This is the reason why the secondary rainbow appears on the rainbow. The order of the color of the second rainbow is also reversed. The bottom is red and the top is purple.