What is specific and molar refraction?
Explanation: The specific refraction r of a substance is equal to the substance’s molecular refraction R divided by its molecular weight M. The refractivity of a medium divided by its density.
What is the formula of molar refraction?
The molar refraction of ligand is calculated as – Rlig = Rmix – Rs – w (3) The polarizability constant (α) of ligand is calculated from following relation- Rlig = 4/3 πNoα (4) Where, No is Avogadro’s number.
What is the unit of molar refraction?
In SI units, R has units of J mol-1 K-1, T has units K, n has no units, and p has units of Pa, so the units of A are m3 mol-1. Therefore, the molar refractivity is the volume of the substance (in cubic meters) taken up by each mole of that substance.
What is refractive index and Snells law?
Snell’s law, in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index of each. This law was discovered in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius).
What is meant by specific refraction?
a parameter characterizing the electronic polarizability of a unit mass of a substance in the high-frequency electromagnetic field of a light wave. The specific refraction r of a substance is equal to the substance’s molecular refraction R divided by its molecular weight M.
What is specific conductivity and molar conductivity?
Specific conductance = Conductance × cell constant. Molar conductance: It is defined as the conductance due to 1 mol of the electrolyte present in volume V of the solution. For electrolyte concentration =c M. Molar conductivity, Λm=cκ It has a unit of Sm2mol−1.
How do you calculate specific refraction?
Refractive Index (Index of Refraction)
- Figure 1 – Refraction of Light.
- Formula 1 – Snell’s Law. n 1 × sin(θ 1) = n 2 × sin(θ2)
- Formula 2 – Numerical Aperture. NA (numerical aperture) = n × sin(θ)
- Formula 3 – Refractive Index (or Index of Refraction) n = c/η
Which is Snell’s law?
In 1621, Willebrord Snell discovered the law of refraction, hence called Snell’s law. Snell’s law is defined as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given pair of media”.
What is meant by molar conductivity?
Molar conductivity is the conductance property of a solution containing one mole of the electrolyte or it is a function of the ionic strength of a solution or the concentration of salt. It is therefore not a constant.
What is difference between molar conductance and molar conductivity?
Basically there is No difference between molar conductance and conductivity. Definition wise the Difference is “Conductance is constant for a particular electrolyte(only when same volume of solvent, say 1000mL is considered), because it takes into consideration of dissociation of 1gram Mole of electrolyte.
What is the Snell’s law of reflection?
Snell’s Law, which can be stated as. nA Sinθ A = nB Sinθ B. predicts how the ray will change direction as it passes from one medium into another, or as it is reflected from the interface between two media. The angles in this equation are referenced to a surface normal, as is illustrated below.
What are the two rules of refraction?
1. The incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane. 2. The ratio of the sine of the angle of incidence i to the sine of the angle of refraction is constant for the pair of given media.