This person's channel was hosted on Vidme, which is no longer in operation. However, you might still be able to find them at these links:
This channel is without any extraneous and unnecessary elements and is devoted to teaching you lesson about power transferred per unit area, where the area is measured on the plane perpendicular to the direction of propagation of the energy. In the SI system, it has units watts per square metre!!!!
March 3 2017
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