Why Light Bends Around Gravity Even Though It Has No Mass

If light has no mass, why does gravity still bend its path? This video explores one of the most fascinating predictions of Einstein’s general theory of relativity — the idea that gravity can bend light even though photons have no rest mass. We look at why gravity is better understood as the curvature of spacetime rather than simply a force pulling on massive objects. We also explore how massive objects like stars, galaxies, and black holes distort spacetime, causing light to follow curved paths. Along the way, we examine gravitational lensing, Einstein rings, the famous observations during the 1919 solar eclipse, and how astronomers use bent light to study distant objects and invisible matter throughout the universe. A slow journey through gravity, spacetime, relativity, and the strange physics that explains why even massless light cannot travel straight through a curved universe. Resources: NASA — Gravitational Lensing https://science.nasa.gov/universe/gra... Einstein Online — Light Deflection https://www.einstein-online.info/en/s... Encyclopaedia Britannica — General Relativity https://www.britannica.com/science/re... NASA — Black Holes https://science.nasa.gov/universe/bla...