The conversation between human and AI assistant.
Does Light attract Light? Light is energy therefore E=mc^2. If it has mass it has gravity?
Okay, that makes sense. But what about the equation E=mc^2? Doesn't that suggest that light has mass?
Yes, it does. The equation tells us that energy and mass are equivalent, and that mass can be converted into energy and vice-versa. Since light has energy, it must have mass according to this equation. However, the amount of mass is incredibly small, which is why light doesn't affect gravity in a noticeable way.