News tagged with oscillator

The Polaris Cluster

(PhysOrg.com) -- A Cepheid star is one whose mass and age results in physical conditions that generate periodic oscillations in its photosphere. A Cepheid thus varies regularly in brightness, with a period ...

May 28, 2010 5 / 5 (2) 0 | with audio podcast

The shell makes the difference

(PhysOrg.com) -- Contrast echography is a commonly used medical imaging technique that is used to show up abnormal blood circulation in organs and tumours. The method makes use of ultrasound and a contrast ...

Apr 12, 2010 3 / 5 (1) 0