When the Sun's light is refracted on passing through tiny rain droplets falling in the air a Rainbow is formed. Rainbows only need light from the sun or the moon and a large amount of spherical raindrops to form in the atmosphere. The rainbows can be compared to mini prisms. The light is refracted ("bending of light as it passes from one medium to another") and it causes different wavelengths (or colors) of the white light to separate. Whether these wavelengths of light will pass through the raindrop or reflect depends on the angle the light strikes the back of the raindrop. If a wavelength of the light strikes the back of the raindrop at an angle less than 48 degree relative to the normal then the light will pass through the raindrop. However, if the light strikes the back of the raindrop at an angle greater than 48 degrees then the light will be reflected. The reflected light is refracted as it exits the raindrop, but the color or the wavelength does not change.
This process is repeated for a large number of raindrops, and a rainbow is formed. It's interesting to note, that the observer has his back to the sun and is facing the raindrops when viewing a rainbow. Thus geometry needs to be just right between the observer,the place where it is raining, and the sun. The light from the sun passes over the observer, strikes rain droplets, and comes back to the observer. Yet, the Earth prevents us to see the whole arc of a rainbow. When the sun is higher in the sky, only a small arc of a rainbow cab be seen from land. The reason for that is that the arc cannot be followed below the horizon(the droplets in the air below the horizon cannot be seen). It is possible to see the full arc of rainbow when flying above the clouds in an airp...
... middle of paper ...
...r than than the rainbow produced by direct light.
Another type of reflective rainbow can be seen on water surfaces like puddles or ponds. After a heavy rainfall, there are lots of spherical floating on a water surface.
Therefore, it ispossible for a rainbow to be formed from indirect light rays. One of the main sources of light is from light, which is reflected back of a water surface, such as a lake or ocean. If we look at two raindrops, the first contributes to the rainbow formed by rays direct from the sun, and the other drop contributes to the rainbow formed by the indirect rays (the one which are reflected off the water surface). The rays leaving both of the drops leave at 42 degrees to the paths at which they entered. Thus, it is clear that a rainbow produced by a reflected light source will appear higher in the sky than one formed by direct sunlight.
...nd violet wavelengths are the shortest, and violet is the least visible to the human eye. These wavelengths are scattered throughout the day and caused by a redirection of the light-waves direction due to gas molecules in the atmosphere (Mc Knight, p. 84). When the sun is setting towards the end of the day there are few blue wavelengths left and we see orange and red which are dominant and the longest wavelengths of visible light to the human eye. At the bottom of the photo (closest to the setting sun) red and orange are the dominant visible colors with the occasional blue and almost violet. If our eyes could not see orange and red our sunsets would be a dark blue or black.
scattering of thin, high clouds. From a vantage point atop one of seven hills I
There are numerous stages that take place simultaneously in the hydrologic cycle and this includes evaporation. This is when the water alters from a liquid state into a gas. The damp air from the water rises into the atmosphere and when it cools, the vapor condenses and shapes into clouds. But those billows are not the only form the vapors make; it can also materialize as dew, fog and mist, which blanket the Earth, characteristically on a rainy or humid day. Evaporation takes place when water changes from a liquid state into a gaseous state, and ascents out of the pores of the earth and into the atmosphere as a vapor (“How”). While evaporation is taking place, condensation is also occurring. When the temperature in the air plunges, the clouds become heavy and as a result they relieve themselves of the extra weight, which is called precipitation. This produces rain, hail, snow and sleet, conditioned upon the temperate. As the precipitation falls, it enters the surface of the ground and percolates into the soil, which is called infiltration. The more porous the land is, the more the infiltration can take place. However, the ground cannot hold all of that water and floods. The excess rainfall, which is also called runoff that has not been absorbed makes its way into bodies of water, such as small ponds, rivers, lakes and parts of the ocean (“Summary”).
Light is the natural agent that stimulates sight and makes things visible. White light is a mix of colors that can be separated by a prism. Sources of white light would include the sun and light bulbs. In chemistry we consider light as electromagnetic radiation. This electromagnetic energy travels through space as waves, at the speed of light. In other words we believe light is a form of energy and that’s mainly what light is, it’s just energy.
In the physical sense, a rainbow appears after a storm in the sky. It is made up of seven different colors. As it forms an arch, we may look at its shape as being a segment of a complete circle. From the rainbows physical dimensions, Shange draws out other qualities that suit the fluidity and logic of her choreopoem. While it can appear a simple natural phenomenon we take for granted, Shanges choreopoem delivers the rainbow as a complex sustaining figure which forecasts a change in the weather and a change in the life of `the colored girls.' The rainbow is a powerful symbol in Shange's choreopoem. It is not only beautiful in one sense, but it's meaning is rather complex. There is more to the rainbow than its seven colors.
Refraction occurs when light travels from one medium crosses a boundary and enters another medium of different properties. For example, light traveling from air to water. The amount of refraction (or bending) can be calculated using Snell's Law.
Once upon a time high above the earth, fluffy white clouds drifted through the atmosphere. In the clouds lived a family Droplet of water, round and content with life. For as long as I could remember, I spent my days lying on my back, relaxing and soaking up the sun's warm rays. One day, I took my usual place in the sun but the light didn't seem to be as bright. In fact, as the day went on, it grew darker and darker, loud claps of thunder shook the cloud, and the Droplet felt as if he were getting so heavy he could hardly move. This is called precipitation.
For example, yellow light is actually a combination of red light and green light. Ocean on a tropical beach, probably reflects a combination of green and blue light and appears blue. Mixing the three primary colors results in white light.
When I was young and saw the picture like the figure1, I think it was not real. It cannot happen in the earth. Maybe someone did Photoshop to edit and retouch the colorful colors in that picture. However, it is a natural phenomenon that happened in the earth 's atmosphere. Galileo Galilei named this phenomenon as "Aurora Borealis." I have three areas of information about auroras to advise you: what aurora borealis is, where the aurora borealis typically seen is, and comparison and contrast this information with Witch Child.
Light is what lets you experience colour. The pigment of the retina in your eyes is sensitive to different lengths of light waves which allows you to see different colours. The wavelengths of light that humans can see are called the visible colour spectrum.
A simple definition of precipitation is any form of water that falls from clouds in the sky. Precipitation includes rain, snow, sleet, freezing rain, and hail. So with that being said let's take a look at these different forms of precipitation.
Rainbow color components are evident through dispersion of visible light and total internal reflection in prisms.
Rain forms when water vapor condenses and falls, the more it condenses the more it falls. Some raindrops are not pure and are filled with other materials, this is known as acid rain. Acid rain is a huge problem all over the world. Acid rain is mixture of chemicals, like fossil fuels and the atmosphere, it then comes down as rain, snow, hail, and sleet. The burning of fossil fuels is the main cause of acid rain. When oil and coal are burned they create sulfur dioxide, nitric oxide, and nitrogen dioxide. (" Acid Rain | US EPA") The mixture of all the chemicals and heavy winds blow the compounds across many borders.
When a ray of light is bounced or reflected off of a plane surface, there is a specific law that can be used to predict the angle at which it is reflected off of the surface. This is known as the ‘Law of Reflection’ and it states:
A thunderstorm that produces large amounts of precipitation which reaches the ground should have deep moisture stratums in unstable conditions, causing enough convection to be restricted to the electrification level of the atmosphere, or being lifted by orographic or frontal systems (Rorig and Ferguson, 1999). However, some thunderstorms produce small amounts of precipitation or none. Colson (1960) explained this phenomenon as a result of high-level thunderstorms with high cloud bases where the appropriate conditions for triggering lightning flashes accompanied by precipitation are situated in the upper levels. Rorig and Ferguson (1999) analysed the synoptic patterns of dry thunderstorms and concluded that low moisture levels in the inferior part of the atmosphere coupled with high instability, leads to the evaporation of precipitation prior to reaching the ground level, this way reducing the moisture content of the underlying surface.