Question

[Polarizability and refractive index Questions] Please help! Explain each one.

1. The refractive index, n of a pure liquid sample:
a) is the ratio of the speed of light in the vacuum and that of the liquid medium
b) depends on the concentration of the substance
c) depends on temperature and density
d) varies with the wavelength of the radiation source
e) a, b, and c are correct

2. In graph n² vs. χ (molar fraction of 1 component) you can see:
a) polarizability
b) experimental refractivity
c) compound formation
d) polarization angle

3. The refractive index of C2H5COOCH3 (M = 88g / mol, r = 0.9215 g /cm3) is 1.3705. Use
the rule of additiveness of refraction of atoms to determine if it applies. Calculate
both values and compare.

a) 17.51, apply
b) 25.42, does not apply
c) 22.35, apply
d) 20.43, does not apply
and. cannot be determined

Átomo Contribución -C- 2.591 -H 1.028 -O- 1.643 =0 2.122 -OH 2.553

Answer 1

1. Answer: e) a,b and c are correct

Refractive index of any substance is the ratio of speed of light in vacuum to speed of light in that medium. For a solution, the refractive index depends upon its concentration. Greater the concentration, greater in the refractive index. It also depends on the temperature and density. Greater the temperature, lesser is the refractive index. Greater the density, greater is the refractive index.