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Do you know what the greatest hoax in the history of science is? In my view, it is this picture: It is taken from the Pink Floyd’s album “The dark side of the moon”. The members of one of the greatest bands of all times have also fallen for this hoax, taking this drawing as an idol of worship on their legendary album. The same drawing can be found in billions of textbooks throughout the world. Why is this drawing a hoax? Because it has nothing, absolutely NOTHING to do with the truth. The phenomenon doesn’t look like that at all. Johann Wolfgang von Goethe has already giv
I will begin this article with phenomena visible on an ordinary triangular prism. Consider the following experiment: in a room, in which direct sunlight enters, we hold the prism with the refracting angle downwards. With the other hand we hold a white sheet of paper behind the prism. When the sheet is very close to it, we see only a regular bright rectangle without any colors. As we move the sheet away from the prism, then a violet-cyan band appears on the upper edge of the rectangle, while a yellow-red band on the bottom edge (image below). We see that the yel