In this video David explains what constructive and destructive interference means as …
In this video David explains what constructive and destructive interference means as well as how path length differences and pi shifts affect the interference. Created by David SantoPietro.
The index of refraction in a material isn't always the same for …
The index of refraction in a material isn't always the same for every wavelength. This is how prisms split white light into so many colors. Created by David SantoPietro.
In this video David explains why physicists came up with the idea …
In this video David explains why physicists came up with the idea of the electric field, how it's useful, and explains how the electric field is defined. Created by David SantoPietro.
The direction of an electrical field at a point is the same …
The direction of an electrical field at a point is the same as the direction of the electrical force acting on a positive test charge at that point. For example if you place a positive test charge in an electric field and the charge moves to the right you know the direction of the electric field in that region points to the right. Created by David SantoPietro.
In this video David explains how to find the electric potential energy …
In this video David explains how to find the electric potential energy for a system of charges and solves an example problem to find the speed of moving charges. To see the calculus derivation of the formula watch this video. Created by David SantoPietro.
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