And we talked about. We talked about lighting up a lamp. Remember i had this lamp and i held it like this, and the lamp lit, and held it like this and it didnt light. Surrounding that dome is an alteration of space. And that space is said to contain an electric field, a force field. And you can tell cause when you walk by this, you can feel your hair stand up a little bit on that. Space is different with all that charge there. And it turns out the force field is stronger in here and weaker, weaker as you go further and further away. In fact, it behaves as an inverse square law, when you have all your charge localized at one place like this. It keeps petering out with the inverse square of distance, just like gravity does. And when i held the lamp like this, it lit. You know why . Thats because this part here was in the stronger part of the force field than here. We say that theres more energy on the charges here than here, which introduces a concept, i wanna see if you can get into, th
And the lamp lit, and held it like this and it didnt light. Surrounding that dome is an alteration of space. And that space is said to contain an electric field, a force field. And you can tell cause when you walk by this, you can feel your hair stand up a little bit on that. Space is different with all that charge there. And it turns out the force field is stronger in here and weaker, weaker as you go further and further away. In fact, it behaves as an inverse square law, when you have all your charge localized at one place like this. It keeps petering out with the inverse square of distance, just like gravity does. And when i held the lamp like this, it lit. You know why . Thats because this part here was in the stronger part of the force field than here. We say that theres more energy on the charges here than here, which introduces a concept, i wanna see if you can get into, the idea of energy per charge, and we call that voltage. Let me define that. Energy per charge. Thatd be ener