Study Set Content:
is the method of measuring the refractive index of substances.
Refractometry
s defined as the ratio of the speed of light in a vacuum to the speed of light in another substance
• Refractive index (n)
The main principle involved in refractometry is the refraction based on the () that passes in the different mediums
speed of the light
Light enters into the light denser medium to high denser medium at an angle, that is, with
bent
Light enters into the light denser medium to high denser medium at an angle, that is, with bent. The bent in the light ray is known as the
refraction
Instrumentation:
Traditional handheld refractometer
Abbes refractometer
The main principle involved in this refractometer is the measurement of the critical angle
Traditional handheld refractometer
It is comprised of the
lenses and prisms
It is comprised of the lenses and prisms to project the() on the glass when the sample is placed between the measuring prism and the plate
black line
Abbes refractometer This is a benchtop refractometer, designed by
Ernst Abbe
n this refractometer, the sample is held between the illuminating prism and the refracting prism.
Abbes refractometer:
s allowed through the illuminating prism
light source
A light source is allowed through the illuminating prism and the detector is placed behind the
refracting prism
eyepiece
adjustment hand wheel
Lens barrel and handle
Adjusting screw sheath
Adjusting screw
Prism table
Cover board
