Photons: Light Particles With No Mass

Photons are the particles of light, carrying energy but having no mass.
They always travel at the speed of light—about 300,000 km per second.
Photons are responsible for the electromagnetic force, one of the four fundamental forces.
They act as the messengers of light, radio waves, X-rays, and all forms of electromagnetic radiation.
Because they are massless, photons can travel billions of years across the universe.
Photons carry both wave and particle properties, embodying the wave–particle duality of light.
The energy of a photon depends on its frequency—higher frequency means higher energy.
Photons have no electric charge, allowing them to pass through empty space unhindered.
They are essential for life, powering photosynthesis and enabling human vision.
From solar panels to quantum technologies, photons are central to modern science and technology.