scientific contribution of Hertz’s research is seen in radio telescopes. Since many interactions in the universe cannot be seen in the visible light part of the electromagnetic spectrum‚ various telescopes‚ such as the radio telescope‚ have been created to detect the effects of these events in other portions of the electromagnetic spectrum (Electromagnetic Spectrum). This is important for observing objects that cannot be seen by the human eye but can be indirectly observed through their effects on
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Ideas about the solar system Our understanding of the solar system has changed over many centuries. Scientists such as Ptolemy‚ Copernicus and Galileo added their ideas to our changing understanding. We observe the universe using a variety of equipment‚ from telescopes to orbiters and landers. Models of the solar system The planets and the Sun orbit the Earth in Ptolemy’s model. Our understanding of the universe has changed over time. Different civilisations have created different models to
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Jr. – Management – Pulitzer Prize for The Visible Hand: The Managerial Revolution in American Business (1977) Alfred D. Chandler‚ Jr. (September 15‚ 1918 – May 9‚ 2007) made a number of publications especially in the later part of his life as the Professor of Harvard University (Carol‚ 20). However‚ it is his publication entitles The Visible Hand: the Managerial Revolution in American Business (1977) which is more of interest. His work in The Visible Hand: the Managerial Revolution in American
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In 2009 President Obama said to the nation’s students‚ “Maybe you could be a mayor or a Senator or a Supreme Court Justice‚ but you might not know that until you join student government or the debate team”(Obama 2009). One of the most pressing issues in America is the decreasing academic performance of urban schools. Students in urban schools are not achieving as much as their suburban counterparts and educators have very few ways to motivate students to do better. While there are many issues
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Historical approaches to regulation Historically‚ although prostitution has been viewed as a threat to the moral order and a danger to public health‚ the state has tended to legislate for the regulation of prostitution‚ rather than introducing measures focused on its elimination. Even early Christian societies did not seek to eliminate prostitution‚ with the Church fathers justifying this stance by asserting that "Sewers are necessary to guarantee the wholesomeness of palaces." (quoted by de Beauvoir
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transverse. Furthermore‚ electromagnetic waves could be specified into several types‚ which in other words is called the ‘Electromagnetic Spectrum’. Hence‚ those waves are scaled within a range from the lowest frequency with a long wavelength to the highest frequency with a short wavelength. In a chronologic order‚ those waves are: radio waves‚ microwaves‚ infrared‚ visible light‚ ultra violet‚ x-rays and lastly‚ gamma rays. Pursuing this further‚ radio waves; the one with the lowest frequency but the
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Now. 1) In this lab‚ you will use the Blackbody Spectrum Simulation to investigate how the spectrum of electromagnetic radiation emitted by objects is affected by the object’s temperature. In this simulation‚ you can input the temperature and observe the spectrum of the radiation emitted. a) The temperature of stars in the universe varies with the type of star and the age of the star among other things. By looking at the shape of the spectrum of light emitted by a star‚ we can tell something
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The electromagnetic spectrum consists of seven different waves. The waves are in the order of how big the wavelength is and its frequency‚ from the biggest to the smallest: Radio waves‚ Micro waves‚ Infrared‚ Visible light‚ Ultra Violet‚ X-rays and Gamma rays. Each of them has their own special use in everyday life. For example‚ to turn on a TV you need to use Radio waves‚ to heat your food you use Microwaves and X-rays are used to look into people’s bodies. Some waves‚ like Radio waves can be as
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A discussion of the regions (or bands or types) of the electromagnetic spectrum is given below. Note that there are no precisely defined boundaries between the bands of the electromagnetic spectrum; rather they fade into each other like the bands in a rainbow (which is the sub-spectrum of visible light). Radiation of each frequency and wavelength (or in each band) will have a mixture of properties of two regions of the spectrum that bound it. For example‚ red light resembles infrared radiation in
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a very broad spectrum. This wide spectrum of wavelengths and photon energy is called the electromagnetic spectrum. There are 7 different types of waves in an electromagnetic spectrum; radio waves‚ microwaves‚ infrared waves‚ visible light‚ ultraviolet waves‚ x-rays and gamma rays. Each of these categories contains different type of waves‚ which varies in wavelength and photon energy‚ which is the units in which electromagnetic radiation come in. Figure 1. An Electromagnetic Spectrum shows the different
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