Minggu, 24 Oktober 2010

natural phenomena and where to witness them










Sabtu, 23 Oktober 2010

Natural Phenomena In Geology

Sometimes, when we watch weather, we may see in the sky phenomena, which are incredibly colourful as well as geometrically formed. These phenomena are caused by sunlight. When the sunlight passes through the atmosphere, it collides with air molecules, ice crystals, or water droplets. The light refracts in these atmospheric particles, producing reflection, mirroring, or bending, which we admire. We perceive these phenomena as a rainbow, mirage, aurora borealis, or aureoles.
Another, but completely different kind of phenomena in the sky, are comets. They appear from "nowhere" and are visible, sometimes for weeks, with their characteristic long tail in the night sky. Then, they disappear again into the far reaches of the universe.

Rainbow is one of the most common optical phenomena in the atmosphere. It is produced by reflection and refraction of the rays of sun in drops of water. When a ray of sun falls on a drop of water, upon entrance it is first refracted, then reflected on its surface. This occurs at a variety of angles.
Not all wavelengths of the sunlight refract with the same intensity. Blue and purple portions refract more than red ones. Thus the light is separated into spectral colours and every colour exits the drop of water at a different angle, which means that blue tones exit at another angle than red tones. This produces a conical beam around each drop of water.
 

This is perceived by an observer as a rainbow of bright colours in purple, blue, and red tones. Red colours are produced at an angle of 42.2 degrees, while purple colours are produced at a 40.4 degree-angle. The intensity of the colour depends on the size of the drop of water. Very small drops of water produce transitional colours, which translate into orange and pink shades. From the point of view of the observer, only a part of this circular formation is visible. If we were in an airplane, assuming a corresponding position of the sun, we might see the entire circle.


This is perceived by an observer as a rainbow of bright colours in purple, blue, and red tones. Red colours are produced at an angle of 42.2 degrees, while purple colours are produced at a 40.4 degree-angle. The intensity of the colour depends on the size of the drop of water. Very small drops of water produce transitional colours, which translate into orange and pink shades. From the point of view of the observer, only a part of this circular formation is visible. If we were in an airplane, assuming a corresponding position of the sun, we might see the entire circle.Mirage is a phenomenon generated by refraction and reflection of the light in layers of air of different density. Many thirsty desert travellers were deceived by a mirage and believed there was a lake or a river nearby.
When a ray of sun passing through the atmosphere, it gradually enters increasingly dense layers of air. This ray is bent, or deflected, whenever it enters each layer. This process is called refraction. The observer perceives these rays as rectilinear. Under extreme heating of the ground, distant objects move downwards. Thus, as a result of this optical shift, blue sky may appear as water on an asphalt surface, disappearing when the distance gets smaller. In a desert, even trees or buildings, which are behind the horizon, may appear as very close.
Aurora borealis is a light phenomenon occurring in the upper atmosphere and is more common in the polar regions. In the northern hemisphere, it is called also northern lights, and in the southern hemisphere they call it southern lights. Aurora borealis is produced by charged particles of the solar wind, which are captured in the magnetic field of the earth. Protons and electrons bombard at a tremendous speed the molecules of oxygen and nitrogen in the upper atmosphere. They expel electrons from these molecules and enrich them with energy. As the molecules revert to their original state, they emit light. The aurora borealis occurs often in an altitude of approximately 100 kilometres. The region, where this phenomenon is most common, is elliptically 23 degrees from both poles.
Halo is the greatest show in the sky. It is produced by the refraction and reflection of the light in ice crystals. It appears as white or sometimes even colourful rings around the sun and the moon.
This phenomenon occurs quite frequently in combination with the cirrus clouds, when a great number of homogeneous ice crystals is available. The phenomenon forms especially on hexagonal plates or columns of the ice crystals.
Another phenomenon involving light, aureole, is not formed by refraction as is the case of a halo or a rainbow, but rather by bending of the rays of sun, which produces geometrical shapes around the moon or the sun. When the waves of light meet drops of water in a cloud, they are bent by variable force. This produces a colourful wreath of light around the sun or the moon. Its radius depends on the size of the drops of water in the cloud. This wreath is called aureole.

Article Source: http://EzineArticles.com/?expert=Karel_Kosman


Spectacular Natural Phenomenon


Refraction in terms of Rainbows is a fluctuation in the direction of the passage of a light ray. This is brought about by the fundamental interaction of the light which ordinarily prompts absorption of the source causing a variation in its velocity. The phenomena is responsible for rainbows in terms of the splitting of white light into a rainbow scale as it travels through a glass optical prism and as illustrated within our skies following rainfall and
immediate sunshine.



 The refraction of light when it transports from a quick medium to a slow-moving channel warps the light ray toward the boundary amid the two media. The quantity of warping pivots on on the indices of refraction of the two media plus is illustrated clearly by Snell's Law. Snell's law is used to work out the degree to which light is refracted when travelling from one medium to another. The law applies to the refraction of light in any circumstance, regardless of what the two media are. Snell's Law supplies the coherent method of responding to the query of "how much does the light ray refract. Snell discovered this amount to illustrate the refractive properties of various materials, but it was subsequently discovered to be connected to the speed of light in the material.



 When a shaft of white light crosses from air into a substance having an index of refraction that changes with frequency, a incident recognized as dispersion takes place, in which distinctive colour constituents of the white light are refracted at varied angles. While refraction enables attractive phenomena such as rainbows, it may additionally cause strange optical phenomena, such as illusions and Fata Morgana.




In sub aquatic acoustics, refraction is the warping or bending of a sound ray which results when the ray transports via a sound velocity gradient from a area of one sound speed to a area of a varied speed. The quantity of ray curving is conditional upon the total distinction amid sound speeds, that is, the diversity in temperature, saltiness, and pressure of the water.
Colours are each refracted to a somewhat distinctive degree and where the refraction is intense brilliant streaks of spectral colours occur. Colour is merely light of distinctive wavelengths and frequencies and light is only one type of energy that we can in fact view which is made up from photons. The principal light colours are red blue and green and by using an optical prism, white light can be parted into all the distinctive colours which constitute white light. The colours of the rainbow are violet, indigo, blue, green, yellow, orange and red and when environmental conditions are favourable a pair of rainbows can be viewed, the clearer chief rainbow and a weaker larger incidental rainbow with the colours flipped. The secondary rainbow has the colours reversed considering that any reflection has caused lateral reversal represented by the reversal of the Rainbow.
Refraction is an significant area of optical methodologies and the ultimate cause of refraction is classed as a modification in light speed and where the light speed varies the most, the refraction is largest.
UK Area 51 is a website dedicated to unexplained events and emerging sciences concerning a wide variety of topics. Our aim is to provide rich, diverse and stimulating articles around the issues that face mankind now and in the future.

Article Source: http://EzineArticles.com/?expert=James_Hewson

Selasa, 19 Oktober 2010

The atmosphere of the Cold







Man works in the world. And its reaction has to be faced always. But the divine law is totally different. In it first an atmosphere is created. And thus creatures, individuals and objects are influenced by it. At their own apt time cold, heat, monsoons create their own atmosphere. One can easily see the influence of autumn and spring season. Era transformation too can be understood as a divine activity akin to seasonal changes. Here the invisible subtle atmosphere plays a major role. In it both the inert and conscious principles get affected.

Anger Nature







Many of us have some very definite ideas about anger. We see anger as destructive and hurtful. We consider it to be an inappropriate response. We equate anger with violence. In short, we feel that anger is simply wrong, and that when we experience anger, there’s something wrong with us. Anger isn’t nice. Anger isn’t polite. And anger certainly isn’t our friend. Anger can be all of these things. But anger is also useful, necessary and even healing. We need our anger. We simply need to learn how to express our anger in appropriate, conscious, supportive ways. On its own, anger is neither good nor bad. It can be used to hurt, or it can be used to heal. It may not be a particularly pleasant emotion, but it’s an important one. We can all benefit from exploring the nature of anger.

Unique Beach








If you are considering a beach wedding, the ideas are as endless as your imagination! Choosing a beach wedding theme allows you total creative freedom.

Underwater World


Unlike some of the other undersea wonders such as the Galápagos Islands and Lake Baikal, the Northern Red Sea does not hold widespread aquatic wildlife. There are abundance of variety of plant life, fish and corals existing inside it that also live in other deep-seas, but this only is an addition to the level of biodiversity here.