According to classical electromagnetism, an accelerating charged particle, such as an electron, would radiate electromagnetic waves regardless of whether it interacts with a photon or not. This is known as bremsstrahlung radiation or acceleration radiation. However, it's important to note that in the context of the quantum mechanical description of particles, such as electrons, the situation is different.
In quantum mechanics, the behavior of particles is described by wave functions and probabilities rather than classical trajectories. When an electron interacts with a photon, the process is described by quantum electrodynamics (QED), which is a quantum field theory that incorporates both quantum mechanics and electromagnetism.
In the case of a single isolated electron without any external influence or interaction, it does not radiate light in a classical sense. This is because the electron's wave function is in a stationary state, which means its energy and momentum are well-defined and constant over time. In this state, there is no net energy transfer or radiation.
However, if the electron is subjected to external influences or interactions, such as collisions or changes in its energy levels, it may undergo transitions between different quantum states. These transitions can involve the emission or absorption of photons, which correspond to the exchange of energy and momentum with the electromagnetic field.
In summary, an isolated electron in a stationary state does not radiate light, but when it interacts with other particles or fields, such as photons, it can undergo processes that involve the emission, absorption, or scattering of photons as described by quantum electrodynamics.