❓ What does Einstein's famous equation E = mc² mean? 🙋 Einstein's equation E = mc² shows the relationship between energy (E), mass (m), and the speed of light (c), illustrating that mass can be converted into energy and vice versa. ⏳ Albert Einstein introduced this equation in 1905 as part of his theory of special relativity, revolutionizing our understanding of physics and the relationship between matter and energy.