Monthly Archives: November 2012

Work and its types

Work: In physics work is said to be done when a force acting on a body displaces it through a certain distance. The work by a constant force is measured by the dot product of force will displacement. i.e. W … Continue reading

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Poynting theorem and derivation

Poynting Theorem Statement. This theorem states that the cross product of electric field vector, E and magnetic field vector, H at any point is a measure of the rate of flow of electromagnetic energy per unit area at that point, … Continue reading

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Applications of optical fibers

Last time I have discussed the various losses and their reasons in optical fibers. Toady we will discuss the various applications of fibers. Optical Fibre Communication System Optical fibers are mainly used in communication systems due to ┬árapidly increasing demands … Continue reading

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Reasons for losses in optical fibers

When a signal passes through an optical fiber, then signal intensity losses may occur. This is called attenuation. There are many reasons for losses in optical fibers. This loss is generally expressed in decibel (dB) and is defined as the … Continue reading

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Best journals of Energy of 2011

Now a days lots of result is done in the field of energy science. Energy science may include biodiesel, solar energy and other many energy resources. I have compiled the list of best or top 20 journals of energy science. … Continue reading

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Earth and Cosmological Events

Cosmology is a science related with the space. It can be divided into two parts. one is the physical cosmology and other is the modern cosmology. Physical cosmology deals with the origin, evolution and future of the universe. There are … Continue reading

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