Electricity and Gravity
Why do scientists have so much of a problem with unifying
electromagnetism and gravity? They are already quite similar. Both of the
forces are thought to be carried by a massless quantum, and both of them
have infinite range. Both of them get weaker with distance also.
An interesting question.
There are significant similarities in the formulas for gravitational force,
magnetic force, and electrical force. We combined magnetic and electrical
force years ago when we realized that magnetic force could be converted into
electrical force and visa versa. If you could use gravity to create electrical
force (and reverse it) you would have a good case for making them one force...
and you would be famous.. the "LRB principle".
By the way, electrical force can attract or repel. Gravity - in our experience
- only attracts. Is that a case for them being different forces, or is it just
that we have never produced ungravity?
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Update: June 2012