1. The Sun's Core: The sun's core is incredibly hot and dense, with temperatures reaching millions of degrees Celsius. This intense heat and pressure force hydrogen atoms to fuse together.
2. Fusion Reaction: When two hydrogen atoms fuse, they form a helium atom. This process releases a tremendous amount of energy in the form of light and heat.
3. Energy Release: The energy released in the fusion reaction is carried outward by photons (particles of light). These photons travel through the sun's layers, bouncing around until they eventually escape into space.
4. Light and Heat: The photons we see as sunlight represent a small fraction of the energy produced by the sun. Most of the energy is released as heat, which warms the Earth and drives our weather.
In summary: The sun's light comes from the continuous fusion of hydrogen atoms in its core, releasing energy that travels outwards as photons.