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Ultra-strong nanocrystalline metal without transition to superplasticity

It is known that a decrease in the grain size of a polycrystalline metal to 1 micron is accompanied by an increase in its strength by several orders of magnitude (super-strength) almost to the ...
Ванек Огонек's user avatar
0 votes
1 answer
42 views

Can we prevent the Higgs field interaction with particles? [closed]

if not why? is it possible in future? Because if it is possible there may be chance of more advance invention
BHAVAN KUMAR P MECH's user avatar
6 votes
4 answers
1k views

Existing (possibly everyday) technologies that must account for electromagnetic momentum?

Can anyone suggest existing technologies that must account for electromagnetic momentum? I believe one example to be confinement in nuclear fusion; but momentum there appears in an averaged form, as ...
pglpm's user avatar
  • 3,753
2 votes
2 answers
68 views

Physically, up to what size is it possible to miniaturize the process node of a silicon chip? [closed]

With current technology we have managed to manufacture silicon chips of up to 3 nm for the semiconductor industry. To what size is it physically possible to make smaller the process node for these ...
Etherealist's user avatar
2 votes
2 answers
126 views

Understanding distant qubit interaction by means of flying particles

Premise: I work on quantum computer science mainly at a circuit level abstraction. During my studies I spent some time to get an understanding of how abstract gates relate to physical settings. My ...
Daniele Cuomo's user avatar
1 vote
0 answers
42 views

Most sensitive device made by humans

I am not sure this question belongs on Physics SE, but I couldn't think of a better SE. My question is, what is the most sensitive device made by humans? Could it be LIGO, the gravitational wave ...
user107952's user avatar
  • 1,252
11 votes
2 answers
4k views

What causes this strange noise in a pair of walkie-talkies?

Let us suppose that Bob and Alice both have walkie-talkies. They are both 3m apart from one another. Alice pushes her walkie-talkie to speak but instead of speaking, she starts walking toward Bob. ...
JW Feynman.'s user avatar
1 vote
1 answer
460 views

Is there a formula for the distance an infrared sensor "senses"? [closed]

I'm making a Raspberry Pi-based infrared sensor for a school research project. Here's the link for the infrared sensor that is attached to the Raspberry Pi. At the moment, I don't have much ...
Anna's user avatar
  • 11
-17 votes
2 answers
433 views

Can (and should) wifi internet be considered a force? [closed]

I've recently been using my wifi internet, for the last few years and have been enjoying it very much. I am able to communicate with my family across the globe in mere seconds, it's obviously a marvel ...
saccharomycescerevisiae's user avatar
2 votes
1 answer
403 views

How to make perpendicular surfaces without a reference surface?

Usually in machine shops, you measure perpendicularity with a reference surface. I am interested in how the perpendicular reference itself is created. Literarily the first one ever. Is there a similar ...
sanjihan's user avatar
  • 105
0 votes
2 answers
578 views

Is it possible to create a laser in the extremely low frequency radio spectrum?

I have been reading about effort to push lasers into the hard X-Ray and soft Gamma Ray range, been quoted as one of the most important problems in physics according to Vitaly Ginzburg. However, would ...
Evamentality's user avatar
0 votes
1 answer
244 views

Why was RGB chosen as the basis / primary color set for pixels?

Human eyes have retinal cells that are sensitive to red, green, and blue light. Pixels on electronic screens use the same three colors to produce many apparent colors. But a little thought (and ...
WillG's user avatar
  • 3,407
1 vote
1 answer
29 views

Is it possible to reveal a slight chronological change in frequency of Voyager 1 and 2 signals due to Hubble flow effect?

Is it possible to reveal a slight change in frequency of Voyager 1 and 2 signals due to Hubble flow effect? As both are about 1 light-day from Earth and as it is unbelievebly small distance compared ...
Janko Bradvica's user avatar
0 votes
1 answer
2k views

Measuring mass of an object in outer space

How do (or will) people measure the masses of objects in outer space? (Like in ISS).
user avatar
2 votes
1 answer
44 views

How come we can grow nanowires? Semiconductors

I'm not a physicist by background but I'm interested in semiconductors and am trying to understand third generation semiconductor material technology. In some of the roadmaps for the 2nm and 3nm chips ...
Kya's user avatar
  • 21
12 votes
5 answers
2k views

Why do dental drills need such high rpm?

Dental drills have always been cutting edge technology when it comes to high rotational speeds. According to Wikipedia modern drills reach more than 180 000 rotations per minute (rpm), which is 3000 ...
A. P.'s user avatar
  • 3,260
0 votes
0 answers
31 views

Advanced wind electricity generation

Well, when it comes to electricity generation it is important to design units to be scalable enough. With wind turbines becoming popular nowadays it is very important. As you know, currently wind ...
PizzaBlogger's user avatar
5 votes
1 answer
156 views

What piece of technology is able to record the exact phase of microwaves?

I read that in VLBI, the signals of microwaves are recorded and then later combined. A famous example of this is the Event Horizon Telescope which imaged the black hole. Presumably, the telescopes ...
Maximal Ideal's user avatar
1 vote
2 answers
88 views

Using technology in Physics [closed]

Currently I find that technology is a wonderful tool in efficiently understanding physics. It helps in giving access to resources and providing a better understanding of topics but what I dislike is ...
0 votes
1 answer
44 views

Optimal radiator sizes? [closed]

Imagine a situation where we need to generate 10 GW of electrical power for about an hour. It would probably require large equipment, which would also produce waste heat. Lets further imagine that ...
Krumuvecis's user avatar
0 votes
0 answers
55 views

Which techniques to explore the stoichiometry of a thin film surface material?

I wonder what other technological approaches are feasible to get the ratio of elemental distribution in the surface near layer of a coated (silicon) wafer. The layer thickness will be from several ...
Markus Walther's user avatar
0 votes
2 answers
134 views

How exactly does quantum mechanics play a role in our day to day life?

From my understanding, quantum mechanics applies mainly to small microscopic particles. When it comes to macroscopic objects, the wave functions collapse and the quantum mechanical properties are lost....
IndianMedico98's user avatar
29 votes
3 answers
4k views

Is there any current technology that depends upon a deep understanding of quarks?

I think the title about says it all. If someone asks me "What good is the Theory of General Relativity?" (or what did Einstein do that was so great, or whatever) My pat answer is, "You use GPS ...
John's user avatar
  • 413
0 votes
2 answers
101 views

Atomic clock in kitchen microwave or other random electronics?

Is it possible for atomic clocks to be put in anything, say a kitchen microwave? Or a regular wall clock? If so, why are they not in all clocks? Is it cost? How much does this tech cost to add to ...
Merlin -they-them-'s user avatar
0 votes
2 answers
50 views

Safe Laser displays

I hope this is in the right stack exchange. Here's my question, assuming that all blue lasers are too risky to the eye to risk [using], is it possible to use only low-energy red and green lasers and: ...
user179283's user avatar
4 votes
2 answers
682 views

How does the "Electromagnetic Position Tracking" work, exactly?

I've been searching the web for the technology of the "Electromagnetic Position Tracking1," and have found the web to be surprisingly ineffectual! I've just came up with some preliminary and basic ...
goodUser's user avatar
  • 141
2 votes
1 answer
2k views

How nuking the poles of Mars would create an atmosphere? [duplicate]

Elon Musk said one of the methods they are taking into consideration to create an atmosphere on Mars is to nuke its poles. How nuking the poles would create the atmosphere?
user avatar
1 vote
1 answer
52 views

Is there a realistic explanation, why depending on the time of the day the picture on a CRT monitor is shifter either right or left?

Is there an explanation, why depending on the time of the day the picture on a CRT monitor is shifter either right or left, on a very old monitor (circa 1998)?
Anixx's user avatar
  • 11.2k
2 votes
1 answer
65 views

Are large scale optical power delivery systems feasible?

I am attending an introductory course of optics and photonics and we just started to study optical fibers for digital communications. However, I have started wondering about using optical fibers to ...
skdys's user avatar
  • 1,193
0 votes
3 answers
784 views

Are infrared jammers possible, and how would they work? [closed]

In the C-64 game Gunship, the player can escape both radar-guided and heatseeking missiles. For the radar ones, he can use a physical countermeasure - chaff - as well as an electronic one - a radar ...
user296844's user avatar
1 vote
0 answers
90 views

Femtosecond-Camera Update

Hopefully I've posted in the correct page. Honestly, I wasn't really sure where to post... Around 2012 or so, Ramesh Raskar gave a TED talk about a femtosecond-camera produced at MIT. It has a good ...
David Lalo's user avatar
1 vote
1 answer
3k views

Is this incredible microscope technology real? [closed]

I recall reading about the relatively old invention of a microscope-like device; apparently able to zoom much further (and with greater clarity) than more "advanced" modern technology. I don't recall ...
voices's user avatar
  • 179
0 votes
0 answers
3k views

Simple real life applications of Euler-Lagrange equations of motion

If you read some introductory mechanics text like David Morin's Introduction to Classical Mechanics about Euler Lagrange Equations you get a large amount of simple examples like the "moving plane" (...
Julia's user avatar
  • 1,692
4 votes
1 answer
266 views

What would happen if a gravitational wave hit me?

What would happen if a gravitational wave hits me? Will it affect me or will something else happen?
aymusbond's user avatar
  • 151
1 vote
0 answers
204 views

Which law of physics is applicable for communication? [closed]

What is the physics behind communication like internet, mobile phones etc. What are the equations?
Sanzeeb Aryal's user avatar
1 vote
1 answer
89 views

Charging with No Current

This may be a basic question, but I am not sure about the exact reason, so I'm asking this I've noticed quite a few times that when you plug an iPad charger to a socket and then switch it on, then ...
Quark's user avatar
  • 619
1 vote
0 answers
228 views

Superconductors and hoverboards

We know that superconductors are repelled by magnetic fields. The earth has a magnetic field of about $10^{-5}$ Tesla. I just want to know if it is possible to use this property of earth to make hover-...
Quark's user avatar
  • 619
1 vote
0 answers
2k views

How would you build a small cyclotron (particle accelerator)? [closed]

I heard Michio Kaku built a small cyclotron when he was young. I bought a book called "Principles of charged particle acceleration" where it explains the basic functioning of particle accelerators. ...
Suriya's user avatar
  • 1,758
1 vote
1 answer
391 views

What does radiofrequency really do in NMR & MRI?

In NMR, the protons’ frequencies are affected by the magnet which makes them precess around its magnetic field so now all protons will have different frequencies according to their environment ...
Ahmed Elbedewhy's user avatar
2 votes
1 answer
188 views

Is there any device/technology based on QFT in curved space?

General relativity has given us the GPS, and QFT has provided a big amount of useful technology, from medical treatments to advances in condensed matter. Can QFT in curved space lead to similar ...
dwfa's user avatar
  • 430
0 votes
1 answer
7k views

How quickly does a small piece of molten steel cool at room temperatures?

Say I have a $(\frac{1}{2}D)^2 \pi \times \ell = (.05)^2 \pi \times .03 \approx 0.000236 \ \text{mm}^3$ piece of molten steel freshly spewed out of a hot nozzle. Now assuming the nozzle moves away ...
SeekingAMathGeekGirlfriend's user avatar
2 votes
1 answer
220 views

How does Laser Surface Authentication work?

As a mathematical graduate student I have some trouble to fully understand Laser Surface Authentication technology. According to Wikipedia: LSA analyses the naturally occurring random structure ...
Applied mathematician's user avatar
1 vote
3 answers
746 views

Two mirrors paradox revisited

If I connect a video camera to a screen, so that whatever is seen by my camera appears on the screen, what do I see when I point it towards the screen itself? Is it, in terms of optics, this ...
usumdelphini's user avatar
  • 1,793
-4 votes
3 answers
3k views

Do mobile phones produce radiation harmful to humans? [closed]

What are the health effects of mobile phone radiation (if any)? Does using a mobile phone without an SIM card change the answer?
Ahmed Elsawy's user avatar
1 vote
1 answer
469 views

Martian space elevator from the vulcano Olympus Mon to the moon Phobos?

In my fascinating imagination, I am seeing a space elevator from the vulcano Olympus Mon to the moon Phobos. Phobos also seems to keep spaceships - while a smaller shuttle attaches itself to the ...
Regina Heising's user avatar
0 votes
2 answers
97 views

why precise accelerometer do not exist

When i read about how the concept works, it looks pretty solid. But in reality accelerometers are just so imprecise that they need to be configured with alternative ways to correct their positions. I ...
Muhammad Umer's user avatar
1 vote
1 answer
126 views

Will it ever be possible to observe the cosmic neutrino background?

Is there any foreseeable technology which would facilitate the direct observation of the cosmic neutrino background? Would the ability to warp spacetime have any application here?
tbyrd's user avatar
  • 101
0 votes
1 answer
3k views

Scanning Electron Microscopy: Explanation of Numerical aperture and Extraction Field

I am trying to understand what numerical aperture and extraction field means in a scanning electron microscope. From what I understand numerical aperture is used to set the Depth of Focus which is ...
user40929's user avatar
9 votes
2 answers
3k views

Which is the "roundest man-made object": Gravity probe B rotor or the Avogadro project sphere?

The Avogadro project is part of the efforts to replace the artefact-based standard kilogram with a definition based on naturally reproducible objects. The main challenge is to make a very precise ...
Slaviks's user avatar
  • 4,453
12 votes
2 answers
4k views

Can a compass be used in a submarine?

This question is motivated by several "myths" I have heard recently - I want to know if there is a problem with using a compass inside a submarine. I can see two different issues, so I'm wondering if ...
levitopher's user avatar
  • 5,389