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1- Flashcard

A quantitative, non-destructive measuring technique based on optical principles that are evident in nature

REFRACTOMETRY

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2- Flashcard

~ A method of measuring substances refractive index and assess their compostion or purity.

REFRACTOMETRY

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3- Flashcard

REFRACTOMETRY ~ A technique that measures how light is() when it passes through a given substance.

refracted

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4- Flashcard

Defined as the ratio of the speed of light in a vacuum to the speed of light in another substance.

REFRACTIVE INDEX (N)

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5- Flashcard

Simply, the amount by which light is refracted.

REFRACTIVE INDEX (N)

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6- Flashcard

It is a quantity which is a () for a pure substance under standard conditions of temperature and pressure.

constant

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7- Flashcard

REFRACTIVE INDEX (N)depends of the

temperature and the wavelength of the light.

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8- Flashcard

˗ Help () the identity of a sample by comparing its refractive index to known values.

identify or confirm

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9- Flashcard

Assess the purity of a sample by comparing its refractive index to the value for the

pure substances.

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10- Flashcard

˗ Determine the concentration of a solute in a solution by comparing the solution’s refractive index to a

standard curve

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11- Flashcard

Temperature: due to accompanying change in density. It is () to the RI.

inversely proportional

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12- Flashcard

refractive index of a transparent medium gradually () with increasing wavelength;

decreases

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13- Flashcard

refractive index of a transparent medium gradually decreases with increasing wavelength; this effect is referred to as

normal dispersion.

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14- Flashcard

is the appropriate wavelength for the determination of the RI

sodium D-line at 595 nm

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15- Flashcard

refractive index of a substance() with pressure because of the accompanying rise in density.

increases

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16- Flashcard

Viscosity: it is () to the RI

inversely proportional

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17- Flashcard

FACTORS AFFECTING REFRACTIVE INDEX

Temperature

Wavelength

Pressure

Viscosity

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18- Flashcard

The main principle involved in refractometry is the refraction based on the () that passes in the different mediums

speed of the light

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19- Flashcard

Light enters into the light denser medium to high denser medium at an angle, that is, with

bent

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20- Flashcard

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

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