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141: Light: ... could not be explained while light was thought to be a wave. Planck began to develop the idea of packets of light called photons. The idea of light being a particle was further developed by Einstein for his work on the photoelectric effect. This duality causes light to be very difficult for most people to visualize. Thinking of light as being a particle at times and also a wave at times ...

142: Lasers And Their Applications: ... form a wave that has an amplitude equal to the sum of the individual amplitudes of the original waves. Stimulated emission is the process that the laser works on, which was first proposed by Albert Einstein in 1917. When a sufficient number of atoms, either gas solid or liquid, absorb energy so that they are in an excited state of higher energy stimulated emission can occur. Light of a specific wavelength ...

143: Lasers 4: ... diode laser is the smallest being packed in a transistor like package. The dye laser are very good for their broad, continuously variable wavelength capabilities. The theory of stimulated emission was first proved by Albert Einstein in 1916, then population inverse was discussed by V. A. Fabrikant in 1940. This led to the building of the first ammonia maser in 1954 by J. P. Gordon, H. J. Zeiger, and Charles H ...

144: Lasers 2: ... not moving along together because they are not being emitted at the same instant but instead in random short bursts. Such beams are called incoherent. The process for laser action, was first proposed by Albert Einstein in 1917. The working principles of lasers were outlined by the American physicists Arthur Leonard Schawlow and Charles Hard Townes in their 1958 patent application. The patent was granted but was later challenged by the ...

145: Genetic Engineering -: ... by which parents can have the child of their dreams. Couples might choose to have a copy of a film star, baseball player or scientist, depending on their interests. But what if the copy of Einstein shows no interest in science? Or the football player turns to acting? Success also depends upon fortune. What happens to the child who does not live up to the hopes and dreams of the parent ...

146: Black Holes 3: ... have existed is not new at all. The thought of them first started in 1783 when Rev. John Michell applied Newton’s theory of gravity to predict the possibility of so-called “dark stars.” Albert Einstein’s theory of relativity predicted in 1915 “Schwartzschild singularities.” In 1967, these were renamed “black holes.” A black hole is collapsed object (usually a star) that has become invisible and has such a powerful gravitational ...

147: Dyslexia: ... they will be unsuccessful. Some examples of people who have to live(d) with dyslexia are people like Whoopi Goldberg who is famous for her many roles in the movie industry, another person is Albert Einstein who is famous for the theory of relativity, and Winston Churchill the former Prime Minister of England. As you can see these people were very successful and influential in their life. In conclusion I have ...

148: Black Holes: ... enough to reach the singularity is just about impossible, if you could reach it; no one knows what would happen. Basically, you would be in a place where time does not exist and all of Einstein’s laws will fail. Evidence that black holes are real does exist. Even though you cannot see a black hole, as light cannot escape it, you can measure how much mass there is in an ...

149: Cloning 7: ... embryos sitting in liquid nitrogen storage around the country. "Suppose somebody wanted to advertise cloned embryos by showing pictures of already born children like a product," says Prof. Ruth Macklin, of New York's Albert Einstein College of medicine, who specializes in human reproduction. Splitting an embryo mat seem a great technological leap, but in a world where embryos are already created in test tubes, it's a baby step. The ...

150: Rainforests: ... for our future generations is an ever increasingly nightmarish slippery slope to extinction. If we are going to survive, it is imperative that we change our ways completely and change them right now. As Albert Einstein said, "We shall require a substantially new manner of thinking if mankind is to survive." We believe that as early as 1991, because of the cumulative shortsighted destruction egregiously caused by Homo Sapiens to all ...

Search results 141 - 150 of 235 matching essays