The Disadvantages of Solar Energy

What are the disadvantages of solar energy?Before we can all admire the new and exciting green future, let us have a clear and analytic look on what the disadvantages of solar energy are. Let us also find out what these disadvantages mean practically.

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The Resistor - How Voltage Drops

A resistor driven by a voltage source.Resistors, capacitors and inductors are the basic passive elements of any electric circuit. Find out why resistors are so important, how we may describe and characterize them and what materials they are made off!

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Why Everyone should study Electrodynamics

Electrodynamics should be studied by everyone!Classical electrodynamics is the first field theory students usually encounter. Let us just take a look what kind of impact the discovery of Maxwell's equations had on science. Also: What phenomena will students understand taking the course? If you want, a little motivational overview of electrodynamics.

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The "Mass" of the Photon - Magnetic Fields in Superconductors

a levitating superconductorIf photons had a nonvanishing mass, the electromagnetic fields would show different characteristics than those we are used to: a wavelength dependence of the speed of light, modifications of Coulomb's and Ampères law and thus different fields for charges and dipoles and so on. Find out more about the photon mass and how related theories can be used to describe superconductivity.

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Introducing the Interactive FDTD Toolbox

The interactive FDTD toolboxThe iFDTD is a software made for fast and easy electrodynamic simulations. Its biggest strength lies in the visualization of electrodynamic effects like total internal reflection, light propagation in photonic crystals etc. Detailed tutorials are given as well as some videos made with the toolbox.

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Nanoantennas to Control Quantum Systems

A nanoantenna is used to control the forbidden transition of a quantum system.Richard Feynman gave a remarkable talk at Caltech in 1959 called There’s Plenty of Room at the Bottom. In his contribution, Feynman formulated a noble challenge:
"But I am not afraid to consider the final question as to whether, ultimately - in the great future - we can arrange the atoms the way we want; the very atoms, all the way down!"
I think we have reached that goal!

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Graphene Plasmonics: Antennas for THz Spectroscopy

A graphene antenna is used to change the emission of a molecule.Graphene is a two-dimensional material with extraordinary properties. Its tunable conductivity makes the material a prime candidate for sophisticated light-matter interactions. We will see how graphene antennas can be used to dictate a molecule's emission frequencies

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