Physics of Rainbows Essay -- physics rainbow rainbows

When the Suns decrepit is refracted on passing through tiny rain down droplets falling in the air a Rainbow is compriseed. Rainbows just now 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 slight 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 hail of raindrops, and a rainbow is formed. Its 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 displace 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(prenominal) 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... ...r than than the rainbow produced by direct light.Another type of reflective rainbow can be seen on weewee surfaces like puddles or ponds. After a heavy rainfall, there are lots of spherical floati ng 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 aroma 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.

Effective Communication :: essays research papers

Effective communication is vital in teaching. Fento standards encourage teachers to select and organise relevant information understandably and concisely present information to learners clearly and in an appropriate formatUse a range of communication skills and methods appropriate to specific learners and to the subject being studied. (www.fento.org)The necessary information that we as practitioners be trying to impart to our learners needs to be transmitted in such a way as to eliminate as many barriers or elements of intercession as possible. However there can be numerous factors which hinder the message that we are trying to convey. This is concisely encapsulated by Petty The check and classify phase also provides vital feedback for the teacher. Is learning taking place? Am I teaching too quickly? Are they doing it properly? The importance of this feedback cannot be over-stressed. (Page 30)Petty here was recognising that a harsh barrier to learning is that the receiver may int erpret the message that we send in their own way, according to their common frames of reference, which may be different from ours as the sender. An easy trap for us as practitioners to fall in is the use of jargon. There may be terms or words that we may use regularly and are comfortable using, however, some of our learners may not pick up experienced or even up understand these terms. To help to minimise this confusion Reece and Walker suggest that Non verbal signals or even verbal signals, from the students should give us valuable feedback on the fiber of communications. (Page 271) Therefore we as practitioners must be vigilant in recognising the subtle or even not so subtle feedback on whether the information that we have imparted to the learners has been received in the context that it was sent. This may even include a question and answer session to determine understanding. The effective designing and use of effected and ICT learning materials. The availability of new type s of resources and new types of interaction can satisfy different learning preferences and present alternative ways of accessing the same information.Reece and Walker (page 181) A good aid is one which does a particular job to assist in the learning of a particular topic for a particular mathematical group of learners. But all learners are different. So, what works for one group does not necessarily work with another.Therefore, we must continue to evaluate any resources that we may design and create that it is appropriate for the purpose, each students learning style, ability and understanding.

Indian Killer Essays -- essays research papers

In Indian Killer Alexie uses a pulp-fiction form, the serial killer mystery, to frame the hearty issues facing American Indians. He populates the book with stock characters such as a grizzled ex-cop, a left-wing professor, a right-wing talk tuner personality, drunken bums, thuggish teenagers and a schizophrenic main character who serves as the most obvious suspect in a mystery that never quite resolves itself. bathroom Smith, the troubled Indian adopted by whites appears at first to be the main character, but in some respects he is what Alfred Hitchcock called a McGuffin. The flooring is built around him, but he is not truly the main character and he is not the heart of the story. His struggle, age pointing out one aspect of the American Indian work through, is not the central point. John Smiths experiences as an Indian adopted by whites have left him too befuddled and sad, from the first moment to the last, to serve as the storys true focus. The damage that had been done to John Smith was irreparable from the moment the story began. His death, while a gloomy ending for his character, is in many ways a release from his torment, as demonstrated by his rising from the point of impact and difference his body behind. The value of John Smith is to serve as an extreme example of the damage being done to Indian society.The heart of the story is the experience of Marie Polatkin. Unlike the somewhat stock characters that make up much of the mystery element of the novel, Marie is a fully real...

Symbolism and Loss of Identity in The Handmaids Tale by Margaret Atwoo

Symbolism and Loss of Identity in The Handmaids Tale by Margaret AtwoodIn Margaret Atwoods The Handmaids Tale, Off ruby-red recounts the story of her life and that of others in Gilead, but she does not do so alone. The symbolic meanings found in the dress code of the women, the names/titles of characters, the absence of the mirror, and the smell and hurt imagery aid her in telling of the repugnant conditions in the Republic of Gilead. The symbols speak with a voice of their own and in decibels louder than Offred can ever dare to use. They convey the social structure of Gileadean society and carry the writing of the individuals loss of identity. All the women in Gilead transgress color-coded uniforms. The colors parade their social status and/or role in the reproductive process. The Aunts who run the Rachel and Leah Re-Education Center wear brown they are responsible for the indoctrination of the handmaids. The Marthas, who wear green, are the servants. The Wives wear a type of Vir gin-Mary blue, which signifies their inability to bear children. The handmaids wear red robes and white peaked hats which agree nuns habits. Thus, they personify a religious sacrifice they are like temple prostitutes doomed to a kind of purdah in perpetuity (Rigney 117). In addition, the red color of their clothing symbolizes their fertility. The color-coded uniforms that the women wear does more than just signify their functions. Along with the names/titles of characters, they symbolize the individuals loss of identity. No distinguishing mark of a woman is considered rather, she is lumped with a group in which she is defined only by her social and reproductive function. Essentially, the color-coded uniforms strip each woman of her i... ...litical enemies. The foul and suffocating air of Gilead symbolizes the claustrophobia as soundly as oppression of its inhabitants (Rubenstein 109-110). In The Handmaids Tale some symbolic tools much(prenominal) as dress codes and characters na mes reflect the social standings of individuals in the Gilead society. These same symbols and others such as the mirror draw attention to the loss of individual identity, a theme present throughout the novel. Still others like smell or hunger convey the atmosphere&emdashboth physical and psychological&emdashin Gilead. Whatever their different purposes may be, the symbolic devices achieve the same result they enlighten the contributor on dangerous social tendencies and compel him/her to take action in order to prevent the outcomes they depict. Works CitedAtwood, Margaret. The Handmaids Tale. Anchor Books New York, New York, 1985.

Determinism and Free will Essay -- Philosophy Philosophical Essays

Determinism and Free will Suppose that every item or action has a sufficient beget, which brings that event about. Today, in our scientific age, this sounds like a reasonable assumption. After all, can you imagine or soone seriously claiming that when it rains, or when a plane crashes, or when a business succeeds, there might be no cause for it? Surely, human mien is caused. It doesnt just happen for no reason at all. The types of human behavior for which people are held morally accountable are usually said to be caused by the people who engaged in that behavior. People typically cause their hold behavior by making choices thus, this type of behavior might be thought to be caused by your own choice-makings. This acquitdom to make your own choices is free will. Determinism, a philosophical doctrine against freedom, is the theory stating that all events, physical and mental (including moral choices), are completely determined by previously existing causes that preclude free will . This theory denies the element of chance or contingency, as well as the reality of human freedom, holding that the will is not free but is determined by biological, environmental, social, or mystical imperatives. Since every event in our lives is determined by outside causes, then we are just some sort of robots. Freedom, on the other hand, is rooted behind the idea that we do have control over the choices we make, thus having free will, a requirement for beingness morally accountable for an...

Virus Eradicates Through Mosquitoes Essay -- Essays Papers

Virus Eradicates Through Mosquitoes Have you ever heard of a killer mosquito? In Alicia Campbell and H. Michael Drehers article, A New Transcontinental Disease The wolfram Nile Virus, they describe the viruss origination, transmission, symptoms, treatment, how to avoid it, and the danger. The article was published in June of 2002 in Medsburg Nursing Journal, because the virus is growing rapidly throughout America. The virus early hit United States in New York in 1999, infecting sixty-two people. The authors inform us that it is still a mystery how the virus came to America. One thing is for sure, mosquitoes run away the virus, and they are responsible for the infections in humans. West Niles origination first surfaced along the West Nile district of Uganda in Africa in 1937. Its first inform epidemics took place in Israel during 1951 through 1954, and again in 1957. The largest reported epidemics occurred in South Africa in 1974. There were tens of t housands of infections. A more recent outbreak was in 1996, in Romania where there were over f...

Virus Eradicates Through Mosquitoes Essay -- Essays Papers

Virus Eradicates Through Mosquitoes Have you ever heard of a orca mosquito? In Alicia Campbell and H. Michael Drehers article, A New Transcontinental Disease The West Nile Virus, they describe the viruss origination, transmission, symptoms, treatment, how to avoid it, and the danger. The article was published in June of 2002 in Medsburg Nursing Journal, because the virus is growing rapidly throughout America. The virus first hit United States in New York in 1999, infecting sixty-two people. The authors inform us that it is still a mystery how the virus came to America. One thing is for sure, mosquitoes carry the virus, and they are responsible for the infections in humans. West Niles origination first surfaced on the West Nile district of Uganda in Africa in 1937. Its first reported epidemics took place in Israel during 1951 through 1954, and again in 1957. The largest reported epidemics occurred in atomic number 16 Africa in 1974. There were tens of thousands of infections. A more recent outbreak was in 1996, in Romania where there were over f...