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The point is that it's not a convention - it's a metaphor, as hnriot pointed out.
by nrivadeneira 13y ago
The point is that it's not a convention - it's a metaphor, as hnriot pointed out.
- robotresearcher 13y agoIt's not a metaphor. http://en.wikipedia.org/wiki/Metaphor http://en.wikipedia.org/wiki/Metaphor No one is comparing or likening charge to some other thing. We simply give opposing charge "directions" a name. Everyone uses the name. It's a convention.
- nrivadeneira 13y agoThe comparison that is being made is the direction your thumb points when your fingers wrap in a particular direction. It's not merely giving it a name - it's specifically likening the vector to the relative orientation of your fingers. That's why the comparison is memorable. If it were merely a name with nothing that it is compared to, it would not be memorable nor helpful.