Physics Weekly Newsletter
Physics Weekly Newsletter

Top new questions this week:

Are there tides in the atmosphere?

Analogous to the tides of Earths oceans, do the Moon and Sun cause our atmosphere to bulge in what could be described as a low and high tide?

gravity atmospheric-science tidal-effect  
asked by Alex 38 votes
answered by Floris 27 votes

Pouring oil on choppy water to calm it , does it work and if so how?

Near where I live, local fishermen often bring cans of castor oil with them, to calm the water around their boats, if they feel bad weather is due. They claim this method of sea calming works, ...

fluid-dynamics energy waves experimental-physics  
asked by Acid Jazz 28 votes
answered by Floris 25 votes

How do we see? Where do the photons disappear?

I know that the light is reflected from a object to my eyes, but I don't understand exactly how. The photons appear from the light source and disappear in my eye! Can someone explain the phenomenon of ...

optics visible-light photons biophysics eye  
asked by Stefan 21 votes
answered by anna v 27 votes

Why does the sun make me feel warm?

For a while I thought that the reason I felt warmth from the sun was because my skin was being hit by photons, but then I realized that photons also hit me when I take an X-ray, but I don't feel any ...

energy kinematics photons  
asked by Ryan 15 votes
answered by MichaelS 28 votes

Was Leverrier-Adams prediction of Neptune a lucky coincidence?

According to historians both Adams and Leverrier used Bode's law to guess the distance to Neptune, which led to a vast overestimation of its orbital period (Adams - 227 years, Le Verrier - 218 years, ...

astronomy history celestial-mechanics  
asked by Conifold 12 votes
answered by Damon Blevins 4 votes

Are there any inventions/applications in our world based on QFT?

Are there nowadays any actual devices or experimental applications which are based on the quantum field theory and if so, how are they related to QFT? I could not find any similar question besides ...

quantum-field-theory experimental-technique applied-physics  
asked by Statics 10 votes
answered by Acid Jazz 1 vote

Why don't photons split up into multiple lower energy versions of themselves?

A photon could spontaneously split up into two or more versions of itself and all the conservation laws I'm aware of would not be violated by this process. I've given this some thought, and a system ...

electromagnetism photons entropy quantum-electrodynamics  
asked by Hritik Narayan 9 votes
answered by anna v 9 votes

Greatest hits from previous weeks:

Does wrapping a wet paper towel around a glass bottle really speed up the cooling process?

There are claims like this one that you can improve the cooling speed of beverages when you put them wrapped in a wet paper towel inside the refrigerator/freezer. I've just tried it by myself and ...

thermodynamics everyday-life water temperature evaporation  
asked by Uwe Keim 15 votes
answered by Volker Siegel 6 votes

Why do electrons, according to my textbook, exist forever?

Does that mean that electrons are infinitely stable? The neutrinos of the three leptons are also listed as having a mean lifespan of infinity.

time electrons conservation-laws standard-model neutrinos  
asked by HyperLuminal 89 votes
answered by zeldredge 188 votes

Can you answer these?

Why can xenon gas stay ionised after the "trigger voltage" is removed?

From my understanding of a Xenon flash circuit, a storage capacitor and a trigger capacitor are charged up to about 240V (both with similar RC values, but less capacitance is needed for the trigger ...

electromagnetism electricity electric-circuits plasma-physics ionization-energy  
asked by Blue7 1 vote

Has Sen quantized superstring fields?

Today I saw a paper by Ashoke Sen titled "BV Master Action for Heterotic and Type II String Field Theories". Is it really the "quantization" of superstring fields for the first time? What can be its ...

quantum-field-theory string-theory ads-cft second-quantization string-field-theory  
asked by pinu 2 votes

Definition of luminescence

I saw a definition of luminescence as "any light not resulting from blackbody radiation", but in my view it's too broad. Is an accelerating electron producing luminescence? Or an electron recombining ...

solid-state-physics  
asked by Raul Laasner 2 votes
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