/u/avsa's posts in /r/askscience

Year:

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Nikola Tesla claimed he could generate power from earth's magnetic field, distribute it freely and wireless to anyone and even create death rays. How credible were those claims and where is this technology today?

191 upvotes

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Crosspost from bestof: RobotRollCall is going to answer any questions you have about him and the universe.

89 upvotes

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Aren't some experiments very hard or expensive, and thus not reproducible? Why isn't this a problem?

41 upvotes

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If an electron has a non-zero chance to be a very long distance from the atom, then doesn't the amount of atoms in the universe makes a certainity that there is at least one electron out there orbiting meters away from it's atoms?

30 upvotes

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If color hues are linear in nature, why do we perceive them as circular?

26 upvotes

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How were eclipses predicted before modern astronomy?

14 upvotes

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Are Lorentz transformations equivalent to linear scaling an object rotated 45º? [images included]

13 upvotes

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If the sky is clear you can always see stars as bright points of lights. Does this mean a star constantly flood every squared milimeter, tens of millions of kilometers away with photons?

13 upvotes

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How can some mammals support such extreme temperatures?

11 upvotes

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Dear Ask science: I made a comic summarizing a few things I learned around here, harsh criticism is welcome. [speed of light, relativity]

10 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Nikola Tesla claimed he could generate power from earth's magnetic field, distribute it freely and wireless to anyone and even create death rays. How credible were those claims and where is this technology today?	191
Crosspost from bestof: RobotRollCall is going to answer any questions you have about him and the universe.	89
Aren't some experiments very hard or expensive, and thus not reproducible? Why isn't this a problem?	41
If an electron has a non-zero chance to be a very long distance from the atom, then doesn't the amount of atoms in the universe makes a certainity that there is at least one electron out there orbiting meters away from it's atoms?	30
If color hues are linear in nature, why do we perceive them as circular?	26
How were eclipses predicted before modern astronomy?	14
Are Lorentz transformations equivalent to linear scaling an object rotated 45º? [images included]	13
If the sky is clear you can always see stars as bright points of lights. Does this mean a star constantly flood every squared milimeter, tens of millions of kilometers away with photons?	13
How can some mammals support such extreme temperatures?	11
Dear Ask science: I made a comic summarizing a few things I learned around here, harsh criticism is welcome. [speed of light, relativity]	10