PENGAMATAN PERUBAHAN SUDUT POLARISASI CAHAYA AKIBAT PEMBERIAN MEDAN LISTRIK STATIS PADA MINYAK GORENG

Abstract

The non linear optic, especially concerning the effect of applied voltage and heating duration at cooking oil to the change of polarization angle at cooking oil has been studied. External electrics field which used at this research resulted from two parallel plates 5×3 cm, separate 2.5 cm and applied high voltage from 0 to 11 kV. Light sources which used in this research: red laser pointer (l =650 nm) and green laser pointer (l =532 nm) and used brands of cooking oil A, B, C. Every cooking oil devided into three conditions: before heated, after 8 minutes heated and after 16 minutes heated. The character which observed is effect of applied static electrics field and heating duration to change of laser polarization angle and the effect of inversion electrics field direction to change of light polarization angle. Result of observation at three cooking oil type got that: 1. An increasing of applied voltage given the biggest change of light polarization angle at cooking oil after 16 minutes heated. 2. The biggest change of polarization angle occurred at oil of B after 16 minutes heated. 3. Change of light polarization angle that happened after inverting electrics field E direction smaller than before inverting E direction.