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Conversion Formula:
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The conversion between electron volts (eV) and joules (J) is a fundamental calculation in physics that converts energy measurements from the atomic scale (electron volts) to the standard SI unit of energy (joules).
The calculator uses the conversion formula:
Where:
Explanation: One electron volt is defined as the amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in vacuum.
Details: This conversion is essential in various fields including particle physics, quantum mechanics, semiconductor technology, and radiation physics where energies are typically measured in electron volts at the atomic and subatomic level.
Tips: Enter the energy value in electron volts (eV). The value must be a non-negative number. The calculator will automatically convert it to joules using the standard conversion factor.
Q1: Why is the conversion factor 1.602 × 10⁻¹⁹?
A: This value represents the charge of one electron (1.602 × 10⁻¹⁹ coulombs) multiplied by one volt, which equals one joule per electron volt.
Q2: What are typical energy values in electron volts?
A: Atomic binding energies are typically a few eV, chemical bond energies are 1-10 eV, while particle physics deals with MeV (10⁶ eV) to GeV (10⁹ eV) ranges.
Q3: When is this conversion most commonly used?
A: This conversion is essential in particle physics, spectroscopy, semiconductor device characterization, and radiation dose calculations.
Q4: Are there limitations to this conversion?
A: The conversion factor is exact and universal for converting between these two energy units, with no inherent limitations.
Q5: Can this calculator handle very large or very small values?
A: Yes, the calculator can handle values across the practical range used in physics, from micro-electron volts to tera-electron volts.