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Wavelength Formula:
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Wavelength calculation using the formula λ = hc/E determines the wavelength of electromagnetic radiation from its energy, where h is Planck's constant, c is the speed of light, and E is the energy of the photon.
The calculator uses the wavelength formula:
Where:
Explanation: This formula calculates the wavelength of a photon based on its energy using fundamental physical constants.
Details: Calculating wavelength from energy is essential in quantum mechanics, spectroscopy, and various fields of physics and chemistry where the properties of electromagnetic radiation need to be determined.
Tips: Enter the energy value in joules. The energy must be a positive number greater than zero for valid calculation.
Q1: What are the units for wavelength calculation?
A: Wavelength is calculated in meters (m), energy in joules (J), Planck's constant in joule-seconds (J s), and speed of light in meters per second (m/s).
Q2: Can I use electronvolts instead of joules?
A: Yes, but you must convert electronvolts to joules first (1 eV = 1.602176634 × 10⁻¹⁹ J) before using this calculator.
Q3: What is the relationship between wavelength and energy?
A: Wavelength and energy are inversely proportional - higher energy corresponds to shorter wavelength, and lower energy corresponds to longer wavelength.
Q4: What is the range of wavelengths this calculator can handle?
A: This calculator can handle any positive energy value, corresponding to wavelengths across the entire electromagnetic spectrum from gamma rays to radio waves.
Q5: Why are the constants fixed in the calculation?
A: Planck's constant and the speed of light are fundamental physical constants with precisely defined values in the International System of Units (SI).