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Critical Frequency of Ionosphere Formula

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Critical Frequency of Ionosphere is the highest magnitude of frequency above which the waves penetrate the ionosphere and below which the waves are reflected back from the ionosphere. Check FAQs

F c = 9 \cdot \sqrt{N max}

F_c - Critical Frequency of Ionosphere?N_max - Electron Density?

Critical Frequency of Ionosphere Example

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Here is how the Critical Frequency of Ionosphere equation looks like with Values.

Here is how the Critical Frequency of Ionosphere equation looks like with Units.

Here is how the Critical Frequency of Ionosphere equation looks like.

1.3E+9 = 9 \cdot \sqrt{2E+10}

1.3E+9Hz = 9 \cdot \sqrt{2E+101/cm³}

1.3E+9 = 9 \cdot \sqrt{2E+10}

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Critical Frequency of Ionosphere Solution

Follow our step by step solution on how to calculate Critical Frequency of Ionosphere?

FIRST Step Consider the formula

F c = 9 \cdot \sqrt{N max}

Next Step Substitute values of Variables

∴

F c = 9 \cdot \sqrt{2E+101/cm³}

Next Step Convert Units

∴

F c = 9 \cdot \sqrt{2E+161/m³}

Next Step Prepare to Evaluate

∴

F c = 9 \cdot \sqrt{2E+16}

Next Step Evaluate

∴

F c = 1272792206.13579Hz

LAST Step Rounding Answer

∴

F c = 1.3E+9Hz

Critical Frequency of Ionosphere Formula Elements

Variables

Functions

Critical Frequency of Ionosphere

Critical Frequency of Ionosphere is the highest magnitude of frequency above which the waves penetrate the ionosphere and below which the waves are reflected back from the ionosphere.

Symbol: F_c

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Critical Frequency of Ionosphere

Electron Density

Electron Density refers to the concentration or number of electrons per unit volume in a given material or medium.

Symbol: N_max

Measurement: Number DensityUnit: 1/cm³

Note: Value should be greater than 0.

Formulas to find Electron Density

sqrt

A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.

Syntax: sqrt(Number)

Other formulas in Wave Propagation category

Go Electron Density

N max = \frac{(1 - {η r}^{2}) \cdot {f o}^{2}}{81}

Go Refractive Index of Ionosphere

η r = \sqrt{1 - (\frac{81 \cdot N max}{{f o}^{2}})}

Go Maximum Usable Frequency in F-region

F muf = \frac{f c}{\cos (θ i)}

Go Skip Distance

P d = 2 \cdot h ref \cdot \sqrt{{(\frac{F muf}{f c})}^{2} - 1}

How to Evaluate Critical Frequency of Ionosphere?

Critical Frequency of Ionosphere evaluator uses Critical Frequency of Ionosphere = 9*sqrt(Electron Density) to evaluate the Critical Frequency of Ionosphere, The Critical Frequency of Ionosphere formula is defined as the highest magnitude of frequency above which the waves penetrate the ionosphere and below which the waves are reflected back from the ionosphere. Critical Frequency of Ionosphere is denoted by F_c symbol.

How to evaluate Critical Frequency of Ionosphere using this online evaluator? To use this online evaluator for Critical Frequency of Ionosphere, enter Electron Density (N_max) and hit the calculate button.

FAQs on Critical Frequency of Ionosphere

What is the formula to find Critical Frequency of Ionosphere?

The formula of Critical Frequency of Ionosphere is expressed as Critical Frequency of Ionosphere = 9*sqrt(Electron Density). Here is an example- 1.3E+9 = 9*sqrt(2E+16).

How to calculate Critical Frequency of Ionosphere?

With Electron Density (N_max) we can find Critical Frequency of Ionosphere using the formula - Critical Frequency of Ionosphere = 9*sqrt(Electron Density). This formula also uses Square Root (sqrt) function(s).

Can the Critical Frequency of Ionosphere be negative?

No, the Critical Frequency of Ionosphere, measured in Frequency cannot be negative.

Which unit is used to measure Critical Frequency of Ionosphere?

Critical Frequency of Ionosphere is usually measured using the Hertz[Hz] for Frequency. Petahertz[Hz], Terahertz[Hz], Gigahertz[Hz] are the few other units in which Critical Frequency of Ionosphere can be measured.

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