For the advancement of human science
In the Unified Energy Theory (UET), electromagnetic waves, including visible light, are energy oscillations in the unified energy field \( E(r,t) \). These oscillations propagate energy through space, driven by the energy gradient \( \nabla E \) and adhering to the principle of minimum energy, causing photons to move from a source with high potential energy (\( E_p \)) to regions of low potential energy.
Electromagnetic waves are oscillations in the field \( E(r,t) \), classified by frequency (\( \nu \)) or wavelength (\( \lambda \)). In UET, higher frequencies correspond to higher potential energy of photons (\( E_p = h\nu \)), and a stronger energy gradient \( \nabla E \), leading to more intense interactions with matter. Below is the electromagnetic spectrum:
Electromagnetic waves are simultaneous oscillations of the electric field \( \mathcal{E} \) and magnetic field \( \mathcal{B} \) within the field \( E(r,t) \), propagating at the speed of light:
Where \( \epsilon_0 \approx 8.854 \times 10^{-12} \, \text{F/m} \) (permittivity of free space), \( \mu_0 \approx 4\pi \times 10^{-7} \, \text{H/m} \) (permeability of free space). In UET, this speed results from energy oscillations in \( E(r,t) \), with the energy gradient \( \nabla E \) determining the direction of propagation from high to low potential energy regions.
In material media, the wave speed decreases due to interactions with electrons, increasing the energy density in \( E(r,t) \):
For example, in water (\( \epsilon_r \approx 80 \), \( \mu_r \approx 1 \), refractive index \( n \approx 1.33 \)), the speed of light decreases: \( v \approx 2.25 \times 10^8 \, \text{m/s} \). In UET, this reduction is due to an increased \( \nabla E \), causing photons to transition to a lower potential energy state.
Visible light (380–760 nm) consists of oscillations in \( E(r,t) \), with photons as compressed energy points carrying potential energy \( E_p = h\nu \). According to UET, photons move from regions of high potential energy (e.g., the Sun’s emission source) to regions of low potential energy (e.g., the human eye or a surface), driven by the energy gradient:
Where \( k_e \approx 8.99 \times 10^9 \, \text{N·m}^2/\text{C}^2 \), \( q \) is the charge (e.g., electron), \( r \) is the distance, and \( \hat{r} \) is the unit vector. \( \nabla E \) causes photons to move in the direction of decreasing potential energy, adhering to the principle of minimum energy.
In UET, the potential energy of a photon is determined by:
Where \( h \approx 6.626 \times 10^{-34} \, \text{J·s} \), \( \nu \) is the frequency. The potential energy \( E_p \) increases with frequency, with gamma rays (\( E_p \approx 10^{-14} \, \text{J} \)) having higher potential energy than radio waves (\( E_p \approx 10^{-26} \, \text{J} \)). The energy gradient \( \nabla E \) governs photon propagation and interaction:
Main interactions:
Example: In the photoelectric effect, a violet photon (\( \nu \approx 750 \, \text{THz} \), \( E_p \approx 4.97 \times 10^{-19} \, \text{J} \)) excites an electron to escape from a metal (\( W = 2 \times 10^{-19} \, \text{J} \)), with kinetic energy \( E_k = E_p - W \approx 2.97 \times 10^{-19} \, \text{J} \). \( \nabla E \) ensures efficient potential energy transfer.
In UET, electromagnetic waves and light are energy oscillations in the field \( E(r,t) \), with photons as compressed energy points carrying potential energy \( E_p = h\nu \). The energy gradient \( \nabla E \) governs photon propagation and interactions, from high to low potential energy regions, adhering to the principle of minimum energy. This approach provides a unified and simplified perspective on the nature of light and electromagnetic waves in the universe.