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Graphene joins the race to redefine the ampere

Graphene joins the race to redefine the ampere | Biosciencia News | Scoop.it
A new joint innovation by the National Physical Laboratory (NPL) and the University of Cambridge could pave the way for redefining the ampere in terms of fundamental constants of physics.
Biosciencia's insight:

The international system of units (SI) comprises seven base units (the metre, kilogram, second, Kelvin, ampere, mole and candela). Ideally these should be stable over time and universally reproducible. This requires definitions based on fundamental constants of nature which are the same wherever you measure them.

The present definition of the Ampere, however, is vulnerable to drift and instability. This is not sufficient to meet the accuracy needs of present and certainly future electrical measurement. The highest global measurement authority, the Conférence Générale des Poids et Mesures, has proposed that the ampere be re-defined in terms of the electron charge.

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New experiments set to detect gravitational waves

New experiments set to detect gravitational waves | Biosciencia News | Scoop.it
(Phys.org) —Over the next five years, Mansi Kasliwal writes in an astrophysics perspective in the journal Science, researchers will begin setting up experiments designed to detect gravitational waves.
Biosciencia's insight:

Gravitational waves were predicted by Einstein's general theory of relativity. They are distortions in the fabric of space-time and are believed to occur in measurable amounts when massive objects such as neutron stars merge.

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