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Poll: Would you vote in a pointless poll with two identical non-exclusive yet oxymoronic answers?
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Ask a theoretical physicist turned teacher, lecturer and author
#80
RE: Ask a theoretical physicist turned teacher, lecturer and author
(July 21, 2017 at 12:54 pm)pool the matey Wrote: Do you think the cool anti gravity devices in movies that allows objects to freely float around could one day be an actual device available for purchase?

Actually cancelling gravity is very difficult because unlike electrical force, ordinary gravity always attracts and adds up, and it is even difficult to impossible to make substantial amounts of positive gravity. Making negative gravity would require negative energy, and that doesn't seem to exist except in minuscule amounts via e.g. the Casimir effect. So if there are anti-gravity devices I would expect them to use some kind of other force other than gravity to counteract gravity.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition

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RE: Ask a theoretical physicist turned teacher, lecturer and author - by Alex K - July 21, 2017 at 2:38 pm

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