Thursday, May 9, 2013

Refractive Index of a Liquid Using Spectrometer

deflective Index of a liquid using spectrometer deflective Index The refractile proponent (or index of refraction) of a ordinary is a measure of how much the festinate of clear (or other flutters much(prenominal) as sound waves) is reduced inner(a) the intermediate. For example, typical soda-lime crosspatch has a deflective indication of 1.5, which bureau that in shabu, get away travels at 1 / 1.5 = 0.67 times the reanimate of light in a vacuum. Two common properties of glass and other diaphanous materials argon directly related to their refractile power. First, light rays assortment agency when they cross the interface from post to the material, an effect that is employ in lenses. Second, light reflects partially from surfaces that turn over a refractile index different from that of their surroundings.
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[pic] The refractive index, n, of a medium is defined as the ratio of the velocity, c, of a wave phenomenon such as light or sound in a advert medium to the phase velocity, vp, in the medium itself: [pic] Apparatus Spectrometer Mercury arc take fill & hollow optical prism make full with an unknown liquid (here it is glycerin) Experiment The prism spectrometer can utilize to measure the refractive index at a effrontery wavelength using the formula [pic] where A is the prism angle and Dmin is angle of minimal deviation for that wavelength. The spectrometer is a precision instrument and is intimately capable of measuring the refractive to an accuracy of four epoch-making figures. The dispersive power of a material is usually characterised by its number which is defined as [pic] where nd is the refractive index for the atomic number 2 d-line (587.56nm), nF the refractive index for the Fraunhofer (Hydrogen) F-line (486.13nm) and nC the refractive index for the Fraunhofer (Hydrogen) C-line (656.27nm). The resolving power of a prism is addicted by the expression [pic] where d is the diference in path length mingled with the extreme light paths by dint of the prism. Using your experimental...If you want to set out a full essay, society it on our website: Orderessay

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