Physics Concept: Ohm's Law

(1) In order to produce current in a wire, an electric field must exits along the wire. This can be achieved by maintaining a potential difference between the two ends of the wire. Usually, the magnitude of the current flow in a conductor is proportional to the voltage difference between the two ends of the wire as the statement below. V ∞ I...

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Physics Concept: Magnetic Fields Around Directly Electric Current

From the beginning difficult to find a relationship between the magnet with electricity, the electricity we can distinguish between positive and negative electric field. But the magnet can not, if we cut the magnet to a very small then, we'll find north and south poles, we never get north and south poles separately. This striking difference is very difficult to determine the cause of the relationship between electricity and magnetism. Finally Hans Oersted discovered the relationship between electricity and magnetism,...

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Physics Concept: Light Reffraction on Plan Parallel Glass

(1)   When a ray of light traveling through a transparent medium encounters a boundary leading into another transparent medium, as shown in Figure 35.10, part of the energy is reflected and part enters the second medium. The ray that enters the second medium is bent at the boundary and is said to be refracted. The incident ray, the reflected ray, and the refracted ray all lie in the same plane. The angle of refraction...

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Physics Concept: Diffraction Grating

Diffraction is an incident where the wave is maximized at the shore of the narrow slit and light resistor. Light is not more traveling by the straight line path, and this case is causing the light interference so that image at the shore of the light resistance is noisy. The diffraction also limits the small-size of the seen object and the accuracy of the measurement....

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Educational Theory: Social Learning Theory

The process of education is a process of acquiring knowledge of the sources of knowledge, both oral and written sources, which is done by students as subjects in the acquisition of information and knowledge. So, in education would involve the existence of a learning process. Learning is often defined as the addition, expansion, and deepening of knowledge, values and attitudes and skills. Learning is an enduring ability and not from the growth process. (Gagne, 1985)...

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Educational Theory: Teachers and Lecturers as Professional Educators

Educators have two meanings, namely a broad sense and narrow sense. Educators in the broad sense is a person who is obliged to foster children. Naturally all the children, before they mature to receive guidance from the adults so that they can develop and grow naturally. Because humans are naturally also require supervision of children like that because he provided so little instinct to preserve his life....

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Educational Theory: Inquiry Based Learning

The learning process involves a process transfer of learning from educators to the students. In the classical learning, transfer of learning only occur between educators and learners. However, in more advanced learning, transfer of learning occurred on learners and all the resources that enable science. Learning methods are more appropriate to implement it is inquiry method based on discovery learning theory. ...

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Educational Theory: Standard of Professionalism of Scientific Teachers

We have entered the 21st century, known as the knowledge century. The future forecasters(futurist) said that as the century of knowledge because knowledge would become a cornerstone of all aspects of life (Trilling and Hood, 1999). Century is an era of knowledge to the demands of a more complex and challenging. An era with certain specifications that are very large influence on the education and employment....

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Physics News: NASA's Chandra Satellite Discover the Nearest Black Hole

ScienceDaily (Nov. 15, 2010) — Astronomers use NASA Chandra X-ray Observatory have found evidence of the youngest black hole known to exist in our cosmic neighborhood. Black hole of 30 years provides a unique opportunity to observe the object type that develops from the initial phase. Black holes may help scientists better understand how massive stars explode, whether the...

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Physics News: The New Technique for Learning The Dark Energy of Universe

ScienceDaily (July 23, 2010) — Pioneering observations by National Science Foundation's giant Robert C. Byrd Green Bank Telescope (GBT) has given astronomers a new tool for mapping the structure of the macrocosm. This new tool promises to provide valuable clues about the nature of "dark energy" believed to be mysterious is almost three-quarters of the mass and energy of the universe. Dark Energy is a...

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Educational Theory: The Existance of International Standard of School in Indonesia

The education system is central to development in a country. Human resources are developed through education, so the success of development in a country highly dependent on the education system in the country itself. National development in Indonesia is still developing new to say, that in order to compete with countries that are more developed, implemented an education system that need to be developed, at least take some things in the education...

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Educational Theory: Teachers Ethic Codes in Indonesia

With the grace of Almighty God that Indonesian teachers realize that the office of teacher is a honorable and noble profession. Devoted teacher and devoted to the intellectual life of the nation and improve the quality of the Indonesian people who play, pious and noble and master science, technology and art in creating a developed society, just, prosperous, and civilized. Indonesian Teachers always perform professionally with the primary task...

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