Hi.
It's Mr. Andersen and this AP Physics essentials video 126.
It is on the wave-particle duality of light.
There is an old story of four blind men and an elephant and they are each touching it at a different point.
And so this guy says it is pointy.
This one says it is strong and sturdy like a tree.
This one say it is flat like a wall.
And this one says it is a snake.
Now they are all right.
They are all just touching different parts of the elephant.
