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Energy Formula:
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The wavelength to energy conversion calculates the energy of a photon based on its wavelength using the fundamental relationship between energy and wavelength in quantum mechanics. This conversion is essential in fields like spectroscopy, photonics, and materials science.
The calculator uses the energy formula:
Where:
Explanation: The constant 1240 comes from the product of Planck's constant and the speed of light, converted to appropriate units for eV and nm.
Details: Calculating photon energy from wavelength is crucial for understanding light-matter interactions, designing optical devices, and analyzing spectral data in various scientific and engineering applications.
Tips: Enter wavelength in nanometers (nm). The value must be greater than 0. For accurate results, use precise wavelength measurements.
Q1: Why is the constant 1240 used in the formula?
A: The constant 1240 comes from the product of Planck's constant (h) and speed of light (c) converted to appropriate units: (1240 eV·nm) provides the correct conversion factor.
Q2: What is the relationship between wavelength and energy?
A: Energy is inversely proportional to wavelength - shorter wavelengths correspond to higher energy photons, while longer wavelengths correspond to lower energy photons.
Q3: Can this calculator be used for all types of electromagnetic radiation?
A: Yes, the formula applies to all electromagnetic radiation, from radio waves to gamma rays, though the units may need adjustment for very long or very short wavelengths.
Q4: What are typical energy values for visible light?
A: Visible light wavelengths (380-750 nm) correspond to energies of approximately 1.65-3.26 eV.
Q5: How accurate is this conversion?
A: The conversion is mathematically exact based on fundamental physical constants. Accuracy depends on the precision of the wavelength measurement input.