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Free research papers and essays on topics related to: doppler effect
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- Doppler Effect - 679 words
Doppler Effect Christian Johann Doppler, born November 29, 1803 in Salzburg, Austria died March 17, 1853 in Venice. Christian Doppler an Austrian Physicist who first described how the detected frequency of light and sound waves is affected by the relative motion of the source and the detector. This aspect became known as the Doppler Effect. Christian was educated at the Polytechnical Institute in Vienna. Doppler became director of the physical Institute and professor of experimental physics of the University of Vienna in 1850. In 1842 he published Uber das farbige Licht der Dopperlsterne which means Concerning the Coloured Light of Double Stars, which contained his first statement of the Dop ...
Related: doppler, doppler effect, frequency modulation, moving closer, intensity
- Observing Stars - 1,341 words
Observing Stars Observing Stars Our view of the sky at night is possible because of the emission and reflection of light. 'Light' is the better-known term for the electromagnetic spectrum, which includes waves in the visible, ultra-violet, infra-red, microwave, radio, X-ray and gamma-ray regions. The scale of the spectrum is so large that no region is distinct, several overlap each other. Each of these regions in the electromagnetic spectrum represent transverse waves, travelling as electrical and magnetic fields which interact perpendicularly to each other, with different ranges of wavelength. The magnetic field oscillates vertically and the electric field horizontally, and each field induc ...
Related: observing, stars, chemical analysis, hubble space telescope, displacement
- Observing Stars - 1,406 words
... ion of radiation is. Luminosity (L) is the total power emitted by a body. The Stefan-Boltzmann law states that the total energy radiated per unit time by a black body is proportional to the fourth power of its absolute temperature; it also depends on the surface area (A): L = s A T4 Stefans constant (s) = 5.67 x 10-8 W m-2 K-4 The amount of power received per unit area is flux (equal to power / area). Light emitted from an object spreads out in all directions, the further away it gets the less intense it becomes according to the inverse square law: L = d-2 E.g., As Saturn is ten times the distance from the Sun as Earth, the intensity of radiation is receives is 1/100 th of that for Earth ...
Related: observing, stars, energy level, doppler effect, visible
- Quasars - 1,856 words
Quasars Since their discovery, the nature of quasars has been one of the most intriguing and baffling problems as evidenced by the following quotations: the problem of understanding quasi-stellar objects is one of the most important and fascinating tasks in all physics - G.Burbidge and Hoyle. The quasar continues to rank both as one of the most baffling objects in the universe and one most capable of inspiring heated argument - Morrison. The redshift problem is one of the most critical problems in astronomy today - G. Burbidge. Quasars still remain the profoundest mystery in the heavens - Hazard and Mitton. The conventional interpretation of the spectral lines observed in quasars is based on ...
Related: quasars, milky way galaxy, early stages, hubble telescope, camera
- The Beginning Of Time - 1,308 words
The Beginning Of Time The Beginning Of Time There was a period in history when the beginning of the world in which we live in was a expressed through legends and myths, now, through the use of increasingly advanced scientific equipment we can see that the universe is more vast and complex than ever imaginable. The purpose of this paper is to show some of the modern beliefs regarding the beginning of the universe by finding the answer of these questions. What are the commonly excepted theories of the evolution of the universe? What is meant by the Big Bang Theory and how does it work? How our planet and solar system developed from The Big Bang? This paper will use scientific data to base the ...
Related: nuclear fusion, protons and neutrons, short history, loop, silk
- The Night Sky - 3,925 words
... The Night Sky Long ago, people looked into the night sky and wondered what they were looking at? How far away are those twinkles in the sky? Could they all be stars, or maybe, could they be something else? What makes certain lights brighter than others, and how does distance affect their intensity? These questions and other interesting facts will be reviewed in the following pages. One of the most common curiosities regarding the night sky is distance, which can be very hard to determine. Because space is so vast, scientists must use mathematical methods to determine how far away, how large, and how bright something actually measures. However, because of the constantly changing position ...
Related: white dwarfs, morning star, bang theory, venus, galaxy
- The Search For Other Worlds: Extrasolar Planets - 1,258 words
The Search For Other Worlds: Extrasolar Planets Earths Beyond Earth: The Search for Other Worlds In early 1990, the first extrasolar planet was detected, surprising everyone by its strangeness. More planets have now been discovered outside our solar system than in it. These planets present many great mysteries to the astronomical world. Extrasolar planets are planets that exist outside our solar system; they are orbiting a star other than our Sun. So far, eighteen have been found, all of them defying well-established theories about planets and how they operate (Winters, 46). As Stephen Maran said, The new discoveries remind us that ignorance is not just bliss, it is also a lack of imaginatio ...
Related: planets, hubble space telescope, works cited, carnegie institute, telescope
- The Universe - 1,282 words
The Universe It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses called cosmological models that try to find the answer. There are two types of models: Big Bang and Steady State. However, through many observational evidences, the Big Bang theory can best explain the creation of the universe. The Big Bang model postulates that about 15 to 20 billion years ago, the universe violently exploded into being, in an event called the Big Bang. Before the Big Bang, all of the matter and radiation of our present universe were packed together in the primeval fireball--an extremely hot dense state from which the universe rapidly expanded. ...
Related: expanding universe, universe, york john wiley sons, john wiley, kelvin
- Universe And Solar System - 271 words
Universe And Solar System The two most common beliefs of the formation of the Universe and Solar System are The Expanding Universe Theory and The Big Bang. There are some comparisons between the two and some contrasts. Almost all astronomers believe that the universe is expanding although they may have different theories on how this is happening. The Expanding Universe Theory is based on the Doppler Effect, the redshift of different galaxies and the assumption of the Hubble Law. The Doppler effect occurs when a wave-emmitting object moves toward or away from an observer and the sound has a change in pitch as the object continues to move. For example the sound a police car siren when it comes ...
Related: expanding universe, solar, solar system, universe, doppler effect
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