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Deseribe the physical phenomenion that takes place when we measure the refractive index of an orgianic...

Deseribe the physical phenomenion that takes place when we measure the refractive index of an orgianic liquid

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Answer #1

The measuring principle is based on the comparison of two
interferometric measurements of mirror displacements, one of which is performed in the liquid and the other one in the air.

Abbe's refractometer experiment or method is used to measure the refractive index of a given organic liquid. Using a particular monochromatic light source, the apparatus is calibrated with water as the liquid. Adjust the micrometre screw to focus the edge between the bright and dark regions. Adjust the refractometer scale to place the cross wire of the telescope exactly on the boundary between the bright and dark regions. Repeat the same process for different organic liquids after the equipment is calibrated.

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