How can photon have energy, but no mass if “m=E/c^2” (E= mc^2)

Question

How can photon have energy, but no mass if “m=E/c^2” (E= mc^2)

In: 42

Answer 1

Let’s leave the formula aside. Actually everything have mass.

The gravity on the Earth is 9.81. That means every object with weight will be down to surface. But depends on the weight, the different objects have different weight and therefore they down to surface with different speed. If we go to the Moon, it has different gravity and the objects will down to surface with different speed versus Earth.

So, if the gravity be bigger the lightest objects will be down to surface.