the.com/photon
the immortal that's also massless, ageless, and never once felt time pass
means A photon is the smallest possible packet of light or other electromagnetic radiation — the fundamental particle that carries the electromagnetic force.
from Built from Greek phōs, phōtos meaning 'light' — the same root behind photograph and photosynthesis — plus the suffix -on borrowed from electron and ion to mark a particle. The chemist Gilbert Lewis coined the term in the 1920s, though the idea of light coming in discrete 'quanta' was Einstein's two decades earlier; the word arrived to name something physics had already glimpsed.
- no mass
- Has zero rest mass yet carries momentum
- top speed
- Always moves at light speed, never slower
- timeless
- Experiences zero time from its own perspective
- its own antiparticle
- A photon is its own antimatter twin
- ancient light
- Sunlight took 100,000 years to escape the sun