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Three Gratings System for the Measurement of Refractive Index of Liquids

  • Singh, Shyam
This paper describes a very exciting method of finding the refractive index of liquids using a three transmission diffraction gratings. An especially design glass cell is used whose width can be changed using a railing. Light from a low power helium-neon laser is diffracted by a transmission diffraction grating and is collimated by a lens L of short focal length. The parallel beams of light are received by the second grating mounted on the first wall of the glass cell and its first order diffraction is formed on the second wall of the glass cell. The interference is received on a screen at a distance x from the third grating mounted on the second wall of the glass cell. The gratings on the glass walls are very similar having the same grating pitch.
Select Volume / Issue:
Year:
2016
Type of Publication:
Article
Keywords:
Refractive Index; Liquid; Grating; Glass Cell; Lens
Journal:
IJASM
Volume:
3
Number:
3
Pages:
115-116
Month:
May
ISSN:
2394-2894
Hits: 1009

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