Difference between revisions of "Electronvolt"
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: The '''electronvolt''' is denoted with a lower case 'e' followed by an upper case 'V'. | : 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]]). | : 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 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=== | ||
| + | {| class="wikitable" | ||
| + | | style="height:20px; width:100px; text-align:center;" |'''[[Unit]] 1''' | ||
| + | | style="height:20px; width:100px; text-align:center;" |'''[[Unit]] 2''' | ||
| + | |- | ||
| + | | style="height:20px; width:100px; text-align:center;" |1 [[Electronvolt]] | ||
| + | | style="height:20px; width:100px; text-align:center;" |1.60x10<sup>-19</sup>[[Joule]] | ||
| + | |- | ||
| + | | style="height:20px; width:100px; text-align:center;" |1 [[Joule]] | ||
| + | | style="height:20px; width:100px; text-align:center;" |6.25x10<sup>18</sup>'''eV''' | ||
| + | |} | ||
| + | |||
| + | ===Converting to Electronvolts=== | ||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |'''Unit''' | ||
| + | | style="height:20px; width:200px; text-align:center;" |'''To convert''' | ||
| + | | style="height:20px; width:200px; text-align:center;" |'''Electronvolts''' | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |1 [[Gigaelectronvolt]] (1GeV) | ||
| + | | style="height:20px; width:200px; text-align:center;" |Convert to [[Electronvolt]]s x1000,000,000. | ||
| + | | style="height:20px; width:200px; text-align:center;" |1000,000,000eV | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |1 [[Megaelectronvolt]] (1MeV) | ||
| + | | style="height:20px; width:200px; text-align:center;" |Convert to [[Electronvolt]]s x1000,000. | ||
| + | | style="height:20px; width:200px; text-align:center;" |1000,000eV | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |1 [[kiloelectronvolt]] (1keV) | ||
| + | | style="height:20px; width:200px; text-align:center;" |Convert to [[Electronvolt]]s x1000. | ||
| + | | style="height:20px; width:200px; text-align:center;" |1000eV | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |1 [[Electronvolt]] (1eV) | ||
| + | | style="height:20px; width:200px; text-align:center;" |Convert to [[Electronvolt]]s x1. | ||
| + | | style="height:20px; width:200px; text-align:center;" |1eV | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |1 [[millielectronvolt]] 1(meV) | ||
| + | | style="height:20px; width:200px; text-align:center;" |Convert to [[Electronvolt]]s /1000. | ||
| + | | style="height:20px; width:200px; text-align:center;" |0.001eV | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |1 [[microelectronvolt]] 1(µeV) | ||
| + | | style="height:20px; width:200px; text-align:center;" |Convert to [[Electronvolt]]s /1000,000. | ||
| + | | style="height:20px; width:200px; text-align:center;" |0.000001eV | ||
| + | |} | ||
Latest revision as of 10:29, 28 July 2019
Contents
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 |