Hi there! I wanted to ask you, we know that light, photons have a certain fixed speed generally. Wouldn't this imply, considering Heisenberg's uncertainty principle, that the uncertainty for the speed (momentum) of the photons, should be infinite? But we know for sure, for example, that photons exist somewhere (in my fist,inside a building, all over earth,universe etc haha!..) Isn't there a contradiction? How can we know exactly (in general) the speed of the particles and at the same time have an idea of where they are located?