Physics: Technology and Tools

Topics: Technology, Neolithic, Stone Age Pages: 15 (5174 words) Published: August 6, 2013
Tuesday, July 6, 2010
Scope and excitement of physics
Let Us Learn About Scope and excitement of physics
Physics is exciting because, trains us in problem solving, It helps us to have an analytical outlook, to observe rather than see things. Everything is explained on the basis of the cause effect relationship, which helps us think logically and decide rationally Whether or not, a students of plus two continue to learn Physics, the basic problem solving skill he has acquired during the PlusTwo Physics course will remain with him and will be constantly helping him in all walks of life. The knowledge of physics accumulated till 1900 is called classical physics that deals with macroscopic phenomena. It includes subjects like: 1)Mechanics

2)Thermodynamics
3)Electromagnetism, and
4)Optics
The recent knowledge (beyond 1900) is termed 'modern physics', consisting of 2 basic theories. a) Relativity
b) Quantum mechanics

The scope of physics is very large. Physics deals with a wide variety of disciplines such as mechanics, heat and light. Study of mechanics helps us to know the forces involved in the flight of a bird, walk of a man and so on. The study of heat helps us to know the rise and fall of temperatures, working of heat engines and so on. Electricity helps to understand the basic principles involved in generators and motors. The exciting discipline of modern physics takes us into the microscopic world of atoms and electrons. The distribution of charges proposed by Thomson in his model was tested by Ernest Rutherford in 1909 by using subatomic projectiles to bombard a target of atoms. These projectiles, called alpha (a) particles, were identified as one of the products of radioactivity. Rutherford's famous a-particle scattering experiment is represented in the figure above. A stream of high energy a-particles from a radioactive source is directed at a thin foil (thickness-100 nm) of gold metal (having a circular fluorescent zinc sulphide screen round it). Whenever an a-particle strikes the screen, a tiny flash of light is produced at that point. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Technology

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This article is about the use and knowledge of tools. For the Russian band, see Technology (band). For other uses, see Technology (disambiguation).

By the mid 20th century, humans had achieved a mastery of technology sufficient to leave the atmosphere of the Earth for the first time and explore space. Technology (from Greek τέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia[1]) is the making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, and methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal, handle an applied input/output relation or perform a specific function. It can also refer to the collection of such tools, including machinery, modifications, arrangements and procedures. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments. The term can either be applied generally or to specific areas: examples include construction technology, medical technology, and information technology. The human species' use of technology began with the conversion of natural resources into simple tools. The prehistorical discovery of the ability to control fire increased the available sources of food and the invention of the wheel helped humans in travelling in and controlling their environment. Recent technological developments, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale. However, not all technology has...

References: The invention of integrated circuits and the microprocessor (here, an Intel 4004 chip from 1971) led to the modern computer revolution.
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