Quick Answer: What Is The Dimensional Formula Of Stefan’S Constant?

Why is Stefan’s law important?

Stefan’s Law suggests that total radiant heat energy emitted from a surface is proportional to the fourth power of its absolute temperature.

Stefan Law can be applied to a star’s size in relation to its temperature and luminosity..

What is kT value?

kT (also written as kBT) is the product of the Boltzmann constant, k (or kB), and the temperature, T. … In macroscopic scale systems, with large numbers of molecules, RT value is commonly used; its SI units are joules per mole (J/mol): (RT = kT ⋅ NA).

What is the dimensional formula of inductance?

InductanceCharacteristicOther Metric (SI) Equivalents with More Basic Units1 nanoweber / ampere1×10-9 meter2 kilograms / ampere2 second2Metric (SI) Dimensionslength2 × mass × time-2 × electric-current-24 more rows

What is the dimensional formula of energy?

Or, E = [M] × [L1 T-1]2 = M1 L2 T-2. Therefore, energy is dimensionally represented as M1 L2 T-2.

What is dimensional formula of frequency?

For example: if a newborn baby’s heart beats at a frequency of 120 times a minute (2 hertz), its period, T, — the time interval between beats—is half a second (60 seconds divided by 120 beats)….FrequencyCommon symbolsf, νSI unitHzIn SI base unitss−1Dimension

Why is entropy J K?

Thus, under appropriate conditions and definitions, the change in entropy is the amount of heat transferred divided by the temperature. … Thus, under appropriate conditions and definitions, the change in entropy is the amount of heat transferred divided by the temperature. Thus it has the units of J K-1.

What is the dimensional formula of permittivity?

CharacteristicMetric (SI) Dimensionslength-3 × mass-1 × time4 × electric-current2Description in Terms of Other Units and Constants1 / (permeability-of-vacuum speed-of-light-in-vacuum2)QuantityElectric Permittivity5 more rows

What is K in Boltzmann’s formula?

where kB is the Boltzmann constant (also written as simply k) and equal to 1.38065 × 10−23 J/K. In short, the Boltzmann formula shows the relationship between entropy and the number of ways the atoms or molecules of a thermodynamic system can be arranged.

What is Stefan’s law of radiation?

Stefan-Boltzmann law, statement that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. … The law applies only to blackbodies, theoretical surfaces that absorb all incident heat radiation.

What is permeability formula?

Magnetic permeability formula is given as; Magnetic permeability (u) = B/H. Where B = magnetic intensity and H = magnetising field. The SI unit of magnetic permeability is henries per meter (H/m) or newtons per ampere squared (N⋅A−2).

What is SI unit of permittivity?

The SI composite unit of electric permittivity is the farad per meter. … An atomic unit of permittivity is defined as farad per meter where c is the magnitude of the speed of light, and is energy-equivalent to the dimensionless unit 1.

What is the dimension of Stefan’s constant?

Stefan Boltzmann Constant ValueTypes of unitsStefan Boltzmann constant valueUnitsCGS unitsσ ≈ 5.6704×105erg.cm2.s1.K4Thermochemistryσ ≈ 11.7×108cal.cm2.day1.K4US Customary unitsσ ≈ 1.714×109BTU.hr1.ft2.°R4.

What is the dimensional formula of stress?

Therefore, stress is dimensionally represented as [M1 L-1 T-2].

What is dimensional formula of density?

The dimensional formula of density is given by, [M1 L-3 T0]

What is the value of Boltzmann constant k?

Having dimensions of energy per degree of temperature, the Boltzmann constant has a value of 1.380649 × 10−23 joule per kelvin (K), or 1.380649 × 10−16 erg per kelvin.

What is meant by Stefan’s constant?

The Stefan–Boltzmann constant (also Stefan’s constant), a physical constant denoted by the Greek letter σ (sigma), is the constant of proportionality in the Stefan–Boltzmann law: “the total intensity radiated over all wavelengths increases as the temperature increases”, of a black body which is proportional to the …

What is E in Stefan’s law?

Stefan’s Law states that the radiated power density (W/m2) of a black body is proportional to its absolute temperature T raised to the fourth power. E = e σ T4. The emissivity e is a correction for an approximate black body radiator, where e = 1 – R, is the fraction of the light reflected (R) by the black body.