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The theory of relativity, proposed by Albert Einstein, consists of two main parts: special relativity and general relativity. Special relativity deals with the behavior of objects in inertial frames of reference and the constant speed of light. General relativity extends these ideas to include gravity as a curvature of spacetime caused by mass and energy. Together, these theories revolutionized our understanding of space, time, and gravity.

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Is shadow lenghts caused by light a scientific law or therory?

Yes - it's simple trigonomety - the shadow length (assuming level ground, the sun at angle a and a vertical object of height h) is h tan a, where a = 0 at midday with the sun directly overhead.


Why didn't Einstein get Nobel Prize for his theory of relativity?

Albert Einstein was not awarded a Nobel Prize for his theory of relativity. This theory which might better be described as a hyphothesis, was not overlooked by the judges. The judges were not sure that Einstein's Therory was correct and thus no prize was awarded.


Daltons atomic therory?

In the 1800s John Dalton did some experiments and these are some of his magnificent work: * all elements are composed of atoms. atoms can not be divided or destroyed * atoms of the same element are alike * .atoms of different elements are not alike * the atoms of two or more elements can join together to form compounds


What is radiation thermometry?

Radiation thermometry is the basic method for non-contact temperature measurement.It is called by many names as explained on an informative page of the About Temperature Sensors website (http://www.temperatures.com/rts.html). The same page contains many links to related web resources.The website IRWeb.INFO, is an open resource on applications information of IR, or Infrared Thermometers, one of the alternate names for radiation thermometry.Temperature measurement by this method is subject to many error sources and selection of a radiation thermometer to perform a given task can be optimized, if one understands the relationship between the various factors; however, it is not always easy.One of the major problems using this technology is the difficulty in verifying that a given measurement is within acceptable error.Despite these facts, there are countless successful applications as detailed on the above two websites and in two notable publications, both with the late Professor Emeritus David P. DeWitt of Purdue University as a co-author: (1) Therory & Practice of Radiation Thermometery (DeWitt, D.P & Nutter E.A. Wiley Interscience) and (2) Applications of Radiation Thermometery (Richmond & DeWitt; ASTM -available for download on the ASTM.org bookstore).