Electromagnetic radiation is not the only form of energy that can exist without the involvement of anything with mass. In physics, there are various forms of energy that can exist independently of mass. Here are a few examples:
Electromagnetic Radiation: This includes all forms of light, radio waves, microwaves, X-rays, and gamma rays. Electromagnetic radiation consists of oscillating electric and magnetic fields and can propagate through a vacuum.
Gravitational Energy: Gravitational energy is associated with the gravitational field. It is a form of potential energy that depends on the position and mass distribution of objects. Gravitational energy can exist independently of mass.
Kinetic Energy: Kinetic energy is the energy of an object due to its motion. It depends on the mass of the object and its velocity. An object can have kinetic energy even if it does not have mass, such as in the case of massless particles like photons.
Nuclear Energy: Nuclear energy is released during nuclear reactions, such as nuclear fission or fusion. It involves changes in the binding energy of atomic nuclei and does not rely on the presence of mass.
Dark Energy: Dark energy is a theoretical form of energy that is thought to permeate all of space and contribute to the accelerated expansion of the universe. Its exact nature is not well understood, but it is hypothesized to exist independently of mass.
These are just a few examples of forms of energy that can exist without the involvement of anything with mass. Energy is a fundamental concept in physics, and it can take various forms, often arising from different interactions and phenomena.