Brechkraft 



19 



Brennl inie 



Brechkraft refractive power (opt.). 



Brechung, Strahl- refraction or 

 splitting up of rays. 



Brechungs-brennf 1 ache diacaustic. 

 -einheit diopter, dioptry (unit 

 of focal length), -exponent re- 

 fractive index, refractivity. 

 -gesetz^ Snel 1 ius' sches Snell's 

 law of refraction. - indexbestim- 

 mung refractometry. -tnesser re- 

 fractometer. -messer, Augen- 

 diascope, retinoscope. -vermögen, 

 Licht- optical refractive power, 

 refrangibility (of light), -winkel 

 angle of refraction, refracting a. 



Brech-wert, Hauptpunkt- principal 

 point refraction, -winkel angle 

 of refraction, refracting a. 



Brei tbandempf anger broad-band re- 

 ceiver, wide-band r. 



Breite width, breadth, latitude. 

 -, nördliche northern latitude. 



Breite, Doppler- Doppler broaden- 

 ing. 



Breiten-effekt latitude effect 

 (cosmic rays), -höhe meridian 

 altitude, -minute one minute of 

 latitude, -wert azimuth value 

 (of vision). 



breitwinkliger Stellung der Kohlen, 

 Bogenlampe mit scissors-type arc- 

 lamp. 



Bremsdynamometer Prony brake, brake 

 dynamometer. 



Bremse, Frei lauf- free-wheeling 

 brake, coaster b. 



Bremselektrode reflecting electrode, 

 retarding-field e. (in positive- 

 grid tube). 



bremsen brake, retard, check (mo- 

 tion), decelerate. 



Breasfeld reflecting field, re- 

 tarding f. (in electron-oscilla- 

 tion tube), -audion positive- 

 grid detector, electron-oscilla- 

 tion detector or rectifier (nega- 

 tive anode associated with leak 

 resistance and condenser). 

 -elektrode reflecting electrode, 

 retarding-field e. (in positive- 



grid tube), -generator negative 

 transconductance generator or 

 oscillator, positive-grid or re- 

 tarding-field o. -röhre retarda- 

 tion valve, Barkhausen-Kurz re- 

 tarding-field tube. -Schaltung 

 retarding-field or positive-grid 

 circuit scheme (operating with 

 grid maintained at a higher po- 

 tential than plate), Barkhausen- 

 Kurz circuit organization, oscil- 

 lating-electron or electron- 

 oscillation scheme with reflecting 

 electrode. 



Brems-gitter suppressor or cathode 

 grid (in a pentode), -kreis 

 negative-anode or negative-plate 

 circuit, -moment (Zähler) brake 

 or retarding torque (of a meter, 

 etc.). -Spannung negative-anode 

 potential (in electron-oscillation 

 tube), -strahlen rays caused by 

 particle retardation. 



Bremsung der Elektronen reflection 

 (in Barkhausen-Kurz tube); de- 

 flection (in magnetron); decelera- 

 tion or retardation of electrons. 



Breras-vermögen stopping power (of 

 photographic emulsion); braking 

 or retarding power. -Wirkung 

 der negativen Raumladung repelling 

 action of electron charge, nega- 

 tive space charge, -zylinder, 

 Relais mit dashpot relay. 



Brennebene, hintere back focal 

 plane. -, vordere front focal 

 plane. 



brennen, dicht vitrify (cer.). 



Brenner, Fischschwanz- fishtail 

 burner, batswing b. Schlitz- 

 batswing burner, slit b. Schnei d- 

 cutting torch. Zirkon- zirconium 

 burner, z. filament. 



Brennfläche caustic surface (opt.). 

 -, brechende diacaustic. -, reflek- 

 tierende, -, rück strahl ende cata- 

 caustic. 



Brenn-fleck (focused) spot, -glas 

 burning glass, convex lens. 

 -linie focal line, image 1, 



