Einstein - Hopf Drag
Encyclopedia
In physics
, the Einstein–Hopf drag (named after Albert Einstein
and Ludwig Hopf
) is a velocity-dependent drag
force
upon charged particles that are being bathed in thermal radiation.
Physics
Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
, the Einstein–Hopf drag (named after Albert Einstein
Albert Einstein
Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...
and Ludwig Hopf
Ludwig Hopf
Ludwig Hopf was a German theoretical physicist who made contributions to mathematics, special relativity, hydrodynamics, and aerodynamics....
) is a velocity-dependent drag
Drag (physics)
In fluid dynamics, drag refers to forces which act on a solid object in the direction of the relative fluid flow velocity...
force
Force
In physics, a force is any influence that causes an object to undergo a change in speed, a change in direction, or a change in shape. In other words, a force is that which can cause an object with mass to change its velocity , i.e., to accelerate, or which can cause a flexible object to deform...
upon charged particles that are being bathed in thermal radiation.