Many people love seeing a rainbow when it occurs. Rainbows are not only beautiful and fantastic displays of the master artist’s art work, they are fascinating, too. Many people don’t stop to think about the wonder behind rainbows when they see one, so it can be interesting to look at a few facts about them. * Rainbows are most often seen during or just after a rainfall, when there are a lot of tiny water droplets in the air. However, rainbows can also appear in fog, clouds or when there are crystals of ice in the air. Both water and sunlight are needed to make a rainbow, though, regardless of the state of the water. * In order for a rainbow to be seen, sunlight must be refracted by almost exactly 42 degrees to the eyes of the observer. The water or ice crystals act as billions of tiny prisms to refract the light, but it still needs to be 42 degrees of refraction. If the angle is too great or too small, no rainbow is seen, even if the other conditions are perfect for one. Additionally, to see a rainbow, the sun must be behind you and the water droplets or ice crystals need to be in front of you. * Since the rainbow is made from the refraction of light off of droplets of water or ice at a distance, two different people standing side by side won’t see exactly the same rainbow. They will each have a Continue Reading →
Posted in science and tagged double rainbow, facts, light refraction, moon halo, rainbow, sun halo, sunlight by rextrulove with 10 comments.
There are several differences between plants and animals. This is common knowledge and probably isn’t a surprise to anyone. While there are creatures that seem to almost be part plant and part animal, for the majority of the rest of the two kingdoms, there are some traits that define each. For instance, most plants manufacture their own food, in a complex operation where the power of sunlight is combined with the carbon dioxide the plants breath and the water they drink in order to create various sugars. Animals also require sugars in order to survive, along with protein and other substances. However, animals can only get those sugars from plants or other animals that have consumed the plants, for only plants produce the sugars. This is mentioned just to show how different plants and animals usually are and how interdependent they are. Plants rely on the carbon dioxide produced by animals in order to survive. If the level of atmospheric CO2 was to drop only a small amount, many plants would be devastated. Thus, the plants rely on animals and as has already been mentioned, animals rely on plants. One of the most curious differences between plants and animals is that plants don’t have nerves like animals do. Even the most advanced plants lack nerves. This might not be a big thing, but think about it for a moment. If you were to turn toward the sun, you would be able to do so simply because of your nerves. We can Continue Reading →
Posted in science and tagged carbon dioxide, photosynthesis, plant movement, sunflowers, sunlight, water by rextrulove with 2 comments.