Page-4 of Physics Current Affairs, GK & News

Time Crystals

A time-crystal or a space-crystal is basically an open system which shows time translation symmetry breaking (TTSB). The concept was first proposed by the Nobel laureate Frank Wilczek in 2012. He put forward that a time crystal can spontaneously break the symmetry of time translation. They are related to the concepts of zero-point energy and ..

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Quantum Communication

Quantum communication refers to an almost hackproof communication with use of quantum cryptography. The most common application of quantum cryptography is Quantum Key Distribution (QKD in which the quantum mechanical effects are used to perform cryptographic tasks. Quantum communication boasts ultra-high security communication and uses subatomic particles to securely communicate between two points. In case intruder (hacker) ..

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Gravitational Lensing

Normal lenses such as the ones used in a magnifying glass or a pair of spectacles bends the light rays that pass through them by refraction and focuses the light somewhere (such as in your eye). Gravitational lensing is among the first evidences of Albert Einstein’s general theory of relativity – simply put, mass bends light. The gravitational field of a massive ..

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Neutrinos and Neutrino Oscillation

Neutrinos are one of the elementary particles, which make up the universe. They are similar to electrons except that they do not carry electric charge. As they are electrically neutral, they are not affected by the electromagnetic forces like electrons or protons. Neutrinos are only leptons with no electric nature. Other leptons, which carry electric ..

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XFEL- X-Ray Free Electron Laser

XFEL is the world’s largest and powerful X-ray laser. It was unveiled in Hamburg, Germany.  At present, 11 countries have participated in the project. The European XFEL is constructed such that the electrons produce X-ray light in synchronisation, resulting in high-intensity X-ray pulses with the properties of laser light and at intensities much brighter than those produced by conventional synchrotron light ..

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