Rotation of light polarization plane by Faraday effect

Neke optički neaktivne tvari mogu postati optički aktivne u prisustvu magnetskog polja. Elektromagnetsko zračenje se prolaskom kroz transparentne tvari s velikom dielektričnom permitivnošću u prisustvu vanjskog magnetskog polja, kao posljedica optičke aktivnosti, očituje u zakretanju ravnine polarizacije što je poznato kao Faradayev efekt. Mjereni su kutovi zakretanja ravnine polarizacije svijetlosti valnih duljina 405 nm, 450 nm, 532 nm i 650 nm za kristale optičkog stakla (kvarc), kalcijevog klorida (KCl), natrijevog klorida (NaCl) i kalijevog bromida (KBr) te za maslinovo ulje Olivenö̈ – Roth. Kut zakreta ravnine polarizacije svjetlosti proporcionalan je s magnetskim poljem, duljinom uzorka te konstantom poznatom kao Verdetova konstanta. Cilj rada bio je izmjeriti Verdetovu konstantu za gore spomenute materijale te usporediti eksperimentalno dobivene vrijednosti s eventualnim teorijskim vrijednostima.Some optically inactive substances can become optically active in the presence of a magnetic field. Electromagnetic radiation, by passing through transparent substances with a high dielectric permittivity in the presence of an external magnetic field, as a consequence of optical activity, is manifested in the rotation of the plane of polarization known as the Faraday effect. The angles of rotation of the plane of polarization of light of wavelengths 405 nm, 450 nm, 532 nm and 650 nm were measured for the crystals made of flint glass, calcium chloride (KCl), sodium chloride (NaCl) and potassium bromide (KBr), and for olive oil Olivenö̈ - Roth. The angle of rotation of the plane of polarization of light is proportional to the magnetic field, the length of the sample, and a constant known as the Verdet constant. The goal of this thesis was to measure the Verdet constant for the above-mentioned materials and to compare the experimentally obtained values with possible theoretical values/models