Search results
Results from the WOW.Com Content Network
A Helmholtz coil Helmholtz coil schematic drawing. A Helmholtz coil is a device for producing a region of nearly uniform magnetic field, named after the German physicist Hermann von Helmholtz. It consists of two electromagnets on the same axis, carrying an equal electric current in the same direction. Besides creating magnetic fields, Helmholtz ...
Helmholtz's polyphonic siren, Hunterian Museum, Glasgow. Hermann Ludwig Ferdinand von Helmholtz (/ ˈ h ɛ l m h oʊ l t s /; German: [ˈhɛʁ.man vɔn ˈhɛlmˌhɔlts]; 31 August 1821 – 8 September 1894; "von" since 1883) was a German physicist and physician who made significant contributions in several scientific fields, particularly hydrodynamic stability. [2]
Two coils in an anti-Helmholtz configuration are used to generate a weak quadrupolar magnetic field; here, we will consider the coils as being separated along the -axis. In the proximity of the field zero, located halfway between the two coils along the z {\displaystyle z} -direction, the field gradient is uniform and the field itself varies ...
big.assets.huffingtonpost.com
Helix–coil transition model; Hellmann–Feynman theorem; Hellmut Fritzsche; Helmholtz's theorems; Helmholtz coil; Helmholtz decomposition; Helmholtz equation; Helmholtz flow; Helmholtz free energy; Helmholtz reciprocity; Helmholtz resonance; Helmholtz theorem (classical mechanics) Helmut Gröttrup; Helmut Hönl; Helmut Volz; Helsinki ...
In 1934, Braunbek developed the Braunbek coil, a modified Helmholtz coil. In 1939, he disproved Earnshaw's theorem by showing that there are magnetic fields in which small diamagnetic bodies can float in a stable position. [2] He pioneered study into the diffraction of waves, particularly at short wavelengths.
A beam of cathode rays in a vacuum tube bent into a circle by a magnetic field generated by a Helmholtz coil.Cathode rays are normally invisible; in this demonstration Teltron tube, enough gas has been left in the tube for the gas atoms to luminesce when struck by the fast-moving electrons.
In 1856, Hermann von Helmholtz wrote: "A ray of light proceeding from point A arrives at point B after suffering any number of refractions, reflections, &c. At point A let any two perpendicular planes a 1 , a 2 be taken in the direction of the ray; and let the vibrations of the ray be divided into two parts, one in each of these planes.