Difference between revisions of "Electronvolt"

Latest revision as of 10:29, 28 July 2019

Key Stage 5

Meaning

An electronvolt (eV) is a unit of energy defined as the energy required to accelerate an electron across a potential difference of one volt.

About the Electronvolt

The electronvolt is denoted with a lower case 'e' followed by an upper case 'V'.

The electronvolt is equal to 1.60x10^-19 Joules (correct to 3 significant figures).

Since the equation linking Energy (E), charge (q) and potential difference (V) is \(E=qV\), then, considering the charge on an electron is the magnitude of the elementary charge and its energy having been accelerated through a potential difference of 1 volt we can define the energy of a subatomic particle in integers of the elementary charge \(E=eV\) where e is the magnitude of the elementary charge.

Unit Comparisons

Unit 1	Unit 2
1 Electronvolt	1.60x10^-19Joule
1 Joule	6.25x10¹⁸eV

Converting to Electronvolts

Unit	To convert	Electronvolts
1 Gigaelectronvolt (1GeV)	Convert to Electronvolts x1000,000,000.	1000,000,000eV
1 Megaelectronvolt (1MeV)	Convert to Electronvolts x1000,000.	1000,000eV
1 kiloelectronvolt (1keV)	Convert to Electronvolts x1000.	1000eV
1 Electronvolt (1eV)	Convert to Electronvolts x1.	1eV
1 millielectronvolt 1(meV)	Convert to Electronvolts /1000.	0.001eV
1 microelectronvolt 1(µeV)	Convert to Electronvolts /1000,000.	0.000001eV

@@ Line 6: / Line 6: @@
 : The '''electronvolt''' is denoted with a lower case 'e' followed by an upper case 'V'.
 : The '''electronvolt''' is equal to 1.60x10<sup>-19</sup> [[Joule]]s (correct to 3 [[Significant Figures|significant figures]]).
-: Since the equation linking [[energy|Energy (E)]], [[Electrical Charge|charge (q)]] and [[Potential Difference|potential difference (V)]] is <math>E=qV</math> then considering the [[Electrical Charge|charge]] on an [[electron]] is [[magnitude]] of the [[Elementary Charge|elementary charge]] and its [[energy]] having been accelerated through a [[Potential Difference|potential difference]] of 1 [[volt]] we can define the [[energy]] of a [[Subatomic Particle|subatomic particle]] in [[integer]]s of the [[Elementary Charge|elementary charge]] <math>E=eV</math> where '''e''' is the magnitude of the [[Elementary Charge|elementary charge]].
+: Since the equation linking [[energy|Energy (E)]], [[Electrical Charge|charge (q)]] and [[Potential Difference|potential difference (V)]] is <math>E=qV</math>, then, considering the [[Electrical Charge|charge]] on an [[electron]] is the [[magnitude]] of the [[Elementary Charge|elementary charge]] and its [[energy]] having been accelerated through a [[Potential Difference|potential difference]] of 1 [[volt]] we can define the [[energy]] of a [[Subatomic Particle|subatomic particle]] in [[integer]]s of the [[Elementary Charge|elementary charge]] <math>E=eV</math> where '''e''' is the magnitude of the [[Elementary Charge|elementary charge]].
 ===Unit Comparisons===