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Questions tagged [popular-science]

Questions in this tag must be answered in a manner that can be understood by a general audience with at most a basic understanding of physics, mathematics and related sciences. Apply it to questions where the asker clearly requests such answers.

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How can you use gravity while trying to model gravity? [duplicate]

So consider the usual pop-science spacetime model, a bowling ball on a trampoline. Apparently, the ball should sink into the trampoline, causing a dip in the fabric which causes nearby objects to fall ...
stickynotememo's user avatar
-2 votes
1 answer
89 views

Why aren’t there any more revolutionary discoveries in science anymore? [closed]

I read John Hogan’s The End of Science book, and while we are making discoveries and improvements in science all the time; we aren’t discovering things on the fundamental level like fire, gravity, ...
Max's user avatar
  • 143
1 vote
2 answers
107 views

Non-Technical Book on QM

Speaking to my friends and family about my job I often receive the question of what quantum mechanics really is. I always find very time-expensive to explain it with no technical informations and ...
3 votes
2 answers
1k views

Considering subatomic particles constantly appear and disappear, can we say everything around us does too?

I'm very inexperienced in this area and could use some guidance, so I would really appreciate it if you could help satisfy my intellectual curiosity. I've come across the concept that subatomic ...
Aman's user avatar
  • 31
2 votes
2 answers
2k views

Why double rainbows have the orders of the color bands in them inverted?

I did some online search and found the explanation using the following two diagrams. It's not perfectly convincing to me. Or at least it is not clear to me in the following details of the process: ...
user78219's user avatar
-2 votes
1 answer
181 views

How to make an accurate and complete computer real time animation/game that illustrates the twins paradox of special relativity? [closed]

About a year ago I provided a rough outline of what what I thought (based mainly on the book "Relativity Visualized" by L. Epstein) would happen during the twins paradox scenario and sought ...
Matthew Christopher Bartsh's user avatar
-2 votes
1 answer
100 views

In science, is there such a thing as incontrovertible evidence?

Can we make any statement about the universe that is not open to new evidence? For example, we seem to have incontrovertible evidence that the earth is round, but could new technology 500 years from ...
Shoes's user avatar
  • 100
0 votes
2 answers
112 views

Why does the water at the same temperature on the same vessel with water having less mass cool faster?

10 litres of water at 80-degree Celsius cools faster than 15 litres of water at the same temperature kept in identical vessel, why?
Dikshant Bhattarai's user avatar
1 vote
1 answer
151 views

Can a magnetic board become weaker if there are many magnets attached to it?

I have a magnetic whiteboard where I put my travel magnets. I have a plenty of magnets and I am under impression that magnets don't stick as well to the board as they used to when there were just a ...
greenbanzai's user avatar
1 vote
1 answer
32 views

Which material properties determine whether it is best cut with a serrated edge?

Among foods, it is beneficial to use a serrated knife to cut bread and cooked meat, while a serrated edge has less benefit for other items. And then serrated saws are also helpful for cutting wood (...
Betterthan Kwora's user avatar
-1 votes
1 answer
231 views

Time's Arrow, or Why does time seem to be flowing in one direction? [duplicate]

I have been working on this topic for the past 6 months, and I Understand what is time, but why does it have a direction? Why was the Entropy low in the Early Universe? I have got success in some ...
AHMED RAZA's user avatar
1 vote
1 answer
102 views

What quantum mechanical concepts have been used in the "soft" sciences?

At the smallest/simplest level (quantum mechanics), our models of physics becomes less deterministic and more probabilistic. This is also (very) generally what occurs in the most complex sciences (...
johnDanger's user avatar
0 votes
2 answers
178 views

Specular and diffuse reflection at the same time

if we know that tomatoes absorb all the light and reflect the red diffusely, how can we see the reflection of all the light specularly at the shinnig point? there isnt an absorption of other colors at ...
Badr 's user avatar
-5 votes
1 answer
161 views

Was Einstein's General Theory of Relativity wrong? [closed]

Albert Einstein Failed in Three Classical Tests At his theory on general relativity, Einstein concluded that the light just as other material objects, moved in curve if gravity field of an object was ...
Siltogranio's user avatar
2 votes
2 answers
2k views

Solving Young Sheldon's 100th episode vanity card

Please define the terms. Below is Chuck Lorre's 700th vanity card which congratulates Young Sheldon on reaching 100 episodes. Part 1. Find $x$ in $J_0(x)=0$. --> I guess this refers to Bessel of ...
BCLC's user avatar
  • 251
0 votes
2 answers
170 views

Why is my watter bottle wet after the water inside it unfreezes?

I have a filled, warm, and dry (on the outside) water bottle that I put in the freezer. The next day I come and take the water bottle out of the freezer and towel dry the ice gathered around the ...
innating's user avatar
4 votes
2 answers
388 views

In Bell's experiment, can "knowing the future" be that "hidden variable"?

(Sorry if I'm spamming your board with Popular Science speculations, but I just thought this could be an interesting thought experiment). There are quite a few videos on youtube about Bell's ...
avloss's user avatar
  • 151
47 votes
5 answers
12k views

Why are protons, rather than electrons, the nucleus in atoms?

I have been wondering why only electrons revolve around protons instead of protons other way around. They have electrostatic force and I think mass factor has nothing to do here. Then why?
Cyberax's user avatar
  • 727
3 votes
2 answers
244 views

The color of an object, the atom releasing the photon back

I have a question about why the color of an object is as it is. This is something I am wondering about after watching episode 5 of the tv-series Cosmos from 2014. From what I understand a blue object ...
user394334's user avatar
1 vote
2 answers
166 views

Has a true Superconductor ever been produced?

Having a conversation with a friend, we where discussing about the conductivity and resistance changes of superconductors. He insisted that available superconductors produced by universities or ...
SeDo Brisac's user avatar
0 votes
3 answers
109 views

Examples of "natural" observed events (phenomena) without scientific explanation [closed]

Could you provide me some examples of observed events considered "natural" but with no scientific explanation? I would prefer some easy-to-understand examples, not involving a lot of ...
DanielC's user avatar
  • 19
2 votes
1 answer
181 views

What is the size of the magnetosphere of a neutron star?

More precisely, what are the factors that influence that size (mass of the star, spin velocity, accretion disk around it, ... do any of those things matter?) I tried reading this. I cannot: [paper ...
Davi's user avatar
  • 133
10 votes
7 answers
2k views

Do the "colors" live in a 3-dimensional vector space? [closed]

Do the "colors" form a 3-dimensional vector space? Colors are just different frequencies of electromagnetic lights, from the low frequency (infra-red, red) to the high frequency (blue, ...
ann marie cœur's user avatar
3 votes
1 answer
181 views

Can strong and weak "forces" manifest in Newton Units?

The Newton unit ($\text{N}$) is a unit of force on a macroscopic scale: $$1\text{N} = 1 \text{kg m/s}^2.$$ Gravity has so-called the gravitational forces (such as shown in the Newton theory of ...
wonderich's user avatar
  • 7,848
2 votes
1 answer
108 views

Are there any journals for physics that are similar to Crux Mathematicorum?

Basically, I'm looking for a physics journal that contains what Crux Mathematicorum does, which is basically a "problem solving journal" specific for the secondary and undergraduate levels. ...
0 votes
2 answers
477 views

How does pressure inside a tire works?

Why do we have to inflate our tires to a set psi every once in a while? When we drive, does the tire loses air? Is it because of the difference in pressure? Would a properly installed new tire lose ...
Zocatelli's user avatar
  • 101
3 votes
6 answers
2k views

Conceptual problem with general relativity

According to Einstein, mass curves spacetime and objects in the nearby field tends to travel in the shortest possible path to reach their heavier counterparts. My question is was not Newton's ...
Eisenstein's user avatar
0 votes
2 answers
196 views

Can sound be recovered? [duplicate]

An interesting thought struck me today, can sound be recovered? I mean sounds from the past, maybe a year or a millennium back.
Eisenstein's user avatar
0 votes
1 answer
62 views

"Probabilities are the ghosts of quantum mechanical amplitudes"

I came across this quote today; [Quantum computers] process information using quantum mechanical amplitudes. And probabilities are sort of the ghosts of amplitudes after they have been degraded to ...
aaronsnoswell's user avatar
0 votes
2 answers
158 views

CMB variance as percentage - does that make any sense?

Reading a popular science book that is pretty accurate and in depth, but stumbled upon this line (translated): The variation, that the CMB pattern reveals amounts to less than one hundredth of a ...
lthz's user avatar
  • 215
3 votes
2 answers
279 views

Is this explanation to laymen of how curved space time makes you experience gravity correct?

I always found it hard to explain to the lay person how the gravity they are feeling is caused by curved spacetime. Their reaction was just one of bafflement and they ended up thinking that it is just ...
StudiedPhysics1999's user avatar
5 votes
1 answer
686 views

What causes this weird shape through frosted glass? [closed]

I was looking at my frosted window and found that the light behind it from the neighbors house looked like this: Behind the frosted glass is simply an ordinary CFL bulb. The frosting pattern on the ...
Pritt Balagopal's user avatar
1 vote
1 answer
268 views

Double Slit Eraser - does the wave function collapse and restore or never collapse

This video shows a rudimentary double slit eraser experiment. He sends photons through a double slit with a polarization film before the double slits (with a 90 degree difference) to obtain "which-way"...
michael's user avatar
  • 259
1 vote
0 answers
59 views

Do radioactive materials have a property for their natural heat output?

Consider room temperature, would a fissile/fissionable element be naturally warmer to the touch (or a sensitive thermometer) compared to say a glass of water (because the atoms have more ongoing ...
ymb1's user avatar
  • 196
1 vote
2 answers
194 views

How does the weak interaction sense the instability of a nucleus?

To reduce the disruptive energy, the weak interaction allows the number of neutrons to exceed that of protons (...) (via nasa.gov). How did it know it needs to reduce the disruptive energy? Example: ...
ymb1's user avatar
  • 196
1 vote
2 answers
129 views

Formal name for the "pianology" objection towards contemporary particle physics direction of research?

In a popular science book, an interesting objection towards the current direction of particle physics was stated. I tried to search for more on this, but got nowhere. Since I assume this is not an ...
user7610's user avatar
  • 127
3 votes
1 answer
1k views

What are “vibrations” in a field in Quantum Field Theory (QFT)?

For example, in a 2013 article for NOVA Don Lincoln writes: Everywhere in the universe there is a field called the electron field. A physical electron isn’t the field, but rather a localized ...
Tim Shadel's user avatar
1 vote
0 answers
50 views

Example of phenomenon that occurs because Bosons don't obey exclusion principle

I am writing an essay targeted at undergrad level, non-science audience and I am trying to find another real world example of what is possible due to the fact that bosons are not subject to Pauli ...
David Griswold's user avatar
-1 votes
2 answers
83 views

What are some benefits of using a higher temperature of water for cleaning? [closed]

There are lots of benefits of using a higher temperature of water for cleaning. List them!
A guy who likes train's user avatar
13 votes
6 answers
3k views

If photons don't experience time, does that mean time is a consequence of mass? [closed]

If photons don't experience the passage of time because they have no mass, does that mean time is a consequence of mass? To me that's a profound conclusion yet not one I see printed. Is it right?
Andrew Weir's user avatar
3 votes
4 answers
288 views

How are theories selected?

My motivations for asking this question are philosophical but I think this is a question that is best answered by the physics community. There is a problem in the philosophy of science called the '...
Joe Lee-Doktor's user avatar
2 votes
1 answer
103 views

Can a signal be sent and received in the same point? What are the limitations?

I'm wondering about this scenario: START: $B$ and $A$ moving to the right with speed $u$ $A$ present in point $X$ Signal $S$ with speed $v'$ sent by $A$ in point $X$ towards $B$ $\require{AMScd}$ \...
user avatar
0 votes
2 answers
311 views

Book says that gamma rays don't ionise atoms as they pass through matter?

I am reading the book The Greatest Story Ever Told ... So Far by Lawrence Krauss, and I came across this in chapter 9: In 1930 Bothe and his assistant Herbert Becker observed something completely ...
The Pointer's user avatar
0 votes
1 answer
33 views

How to take a Picture of Ice in Mars Pole?

It is say in other thread, that impossible to make satellite orbit above of poles. But there is a claim from NASA, that in pole of Mars there is a cap of ice. So they take a picture of it. How can ...
Mohammad Fajar's user avatar
2 votes
0 answers
106 views

How to show the first low of Kepler's laws

Picture below is from the Kepler's laws of Wiki. I fail to found its proof. I mean that how to use $$ F=G\frac{Mm}{r^2} ~~~~~~\text{and}~~~~~~~ F=ma $$ to prove the orbit of planet must be so. I ...
Enhao Lan's user avatar
  • 351
-3 votes
1 answer
688 views

Can I change the amplitude of light and if so, how? [closed]

Can I change the amplitude of light and if so, how? So I want to know more about light and I need a little information on how to change the amplitude of light. If anyone could help me out here thank ...
Blueblood's user avatar
  • 109
1 vote
1 answer
203 views

Sean Carroll's photons on top of one another

I don't have training in physics, only in mathematics. The following is a passage from From Eternity to here by Sean Carroll, which I wanted to clarify. Photons can be piled on top of one another ...
Hellen's user avatar
  • 113
1 vote
1 answer
2k views

A question on the ideal gas law and the functioning of a fridge

First let me apologize: I am not a physicist and my question is perhaps not well-suited for this expert forum. I didn't find any other place to ask though. We have the (simplified) formula $$ \frac{P ...
user8463524's user avatar
-1 votes
1 answer
211 views

Mistake by Sean Carroll on EPR paradox for layman?

In his book From Eternity to Here, Sean Carroll uses a system consisting of a cat (Miss Kitty) and a dog (Mr. Dog) behaving as quantum objects to introduce the EPR paradox. The cat and dog are ...
courno's user avatar
  • 323
1 vote
2 answers
195 views

Representing a 3D toroidal universe

How would one represent a 3-D wrapping object as outlined in the linked article, Classic JRPG Worlds Are Actually Donuts? In short, it explained that to achieve the x-axis and y-axis wrap that is ...
amflare's user avatar
  • 145

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