masstolight

Masstolight is a term used in theoretical physics and speculative technology to describe schemes that aim to convert rest mass directly into electromagnetic radiation, producing photons as a primary energy output. The concept emphasizes a direct mass-energy to light conversion, distinct from conventional energy generation methods.

Rooted in Einstein's mass–energy equivalence, masstolight discussions explore whether processes can release the full rest-mass energy into photons while maintaining control and directionality. Realistic realizations confront fundamental constraints such as conservation laws, entropy production, and the practical challenges of containing or harnessing large amounts of energy as light.

Proposed approaches fall into several categories, including controlled matter–antimatter annihilation to generate high-intensity gamma rays, development of gamma-ray laser–like devices that channel nuclear transitions into a coherent beam, and hypothetical schemes that couple mass-energy to photonic modes in engineered materials. All remain largely theoretical and face significant engineering barriers.

Currently, no practical masstolight devices have been demonstrated. Major hurdles include safe production and storage of mass-energy carriers (such as antimatter), shielding from intense radiation, and achieving net conversion efficiency high enough for usable power or propulsion. The concept remains controversial and is typically discussed as a long-term theoretical goal.

See also: mass–energy equivalence, antimatter, gamma-ray laser, photonics, energy propulsion, energy conversion.