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Photon Energy Equation:
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The photon energy equation calculates the energy of a photon based on its wavelength. This fundamental physics equation is derived from Planck's relation and is essential in quantum mechanics and spectroscopy.
The calculator uses the photon energy equation:
Where:
Explanation: The equation shows that photon energy is inversely proportional to its wavelength - shorter wavelengths correspond to higher energy photons.
Details: Calculating photon energy is crucial in various fields including quantum physics, spectroscopy, photochemistry, and optical engineering. It helps determine the behavior of light in different materials and its interaction with matter.
Tips: Enter the wavelength in meters. For common light wavelengths, remember that visible light ranges from approximately 380-750 nanometers (3.8×10⁻⁷ to 7.5×10⁻⁷ m).
Q1: What are typical photon energy values?
A: Photon energies vary widely. For visible light, energies range from about 1.65-3.26 eV (2.64×10⁻¹⁹ to 5.22×10⁻¹⁹ J).
Q2: Can I use other units for wavelength?
A: Yes, but you must convert to meters first. Common conversions: 1 nm = 10⁻⁹ m, 1 μm = 10⁻⁶ m.
Q3: Why is photon energy important?
A: It determines many photon properties, including whether it can excite electrons, break chemical bonds, or be detected by specific sensors.
Q4: How does photon energy relate to frequency?
A: Energy is directly proportional to frequency: E = h × f, where f is frequency. This is an alternative form of the same fundamental relationship.
Q5: What is the significance of Planck's constant?
A: Planck's constant is a fundamental physical constant that relates the energy of a photon to its frequency, serving as the quantum of action in quantum mechanics.