/u/dcfan105's posts in /r/askscience

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Is Sabine Hosenfelder correct that we need both dark matter and modified gravity explain all relevant observations?

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Why is separation of variables a valid method of solving Laplace's equation? How is it reasonable to just assume that V can be expressed as X(x)Y(y)Z(z)?

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Does light travels slower in a medium, because it's made of polaritons instead of photons or because the photons themselves still travel at C but the effective speed is still somehow less? I've heard both explanations from reputable physicists.

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Is the electric field moving between two dielectrics essentially the same thing as refraction?

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What actually happens when you break a magnet in half that causes both pieces to become dipoles instead of monopoles?

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Since electricity and magnetism are ultimately aspects of a single phenomena, electromagnetism, only charged particles can exert electric forces and only particles with spin can exert magnetic forces, does that mean that spin and electric charge are, in some sense, the same thing?

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What happens if we keep taking higher order time derivatives of an E field?

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How concept-heavy is semiconductor physics compared electromagnetics?

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What exactly does "volume of a quantum state" mean?

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Why is physical exercise often an effective treatment for chronic pain?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is Sabine Hosenfelder correct that we need both dark matter and modified gravity explain all relevant observations?	1
Why is separation of variables a valid method of solving Laplace's equation? How is it reasonable to just assume that V can be expressed as X(x)Y(y)Z(z)?	1
Does light travels slower in a medium, because it's made of polaritons instead of photons or because the photons themselves still travel at C but the effective speed is still somehow less? I've heard both explanations from reputable physicists.	1
Is the electric field moving between two dielectrics essentially the same thing as refraction?	1
What actually happens when you break a magnet in half that causes both pieces to become dipoles instead of monopoles?	1
Since electricity and magnetism are ultimately aspects of a single phenomena, electromagnetism, only charged particles can exert electric forces and only particles with spin can exert magnetic forces, does that mean that spin and electric charge are, in some sense, the same thing?	1
What happens if we keep taking higher order time derivatives of an E field?	1
How concept-heavy is semiconductor physics compared electromagnetics?	1
What exactly does "volume of a quantum state" mean?	1
Why is physical exercise often an effective treatment for chronic pain?	1