How can a string the size of the Planck length (10^-35 m) have a wavelength of the speed of light in meters (10^8 m)?

A serious question, if the minimum length of a single quanta (where n =1) is the Planck length; and the maximum wavelength, from E=hf (where f=1), is the speed of light in meters, then how are...

07 August 2018 6,961 3 View

Is the magentism in electromgnetism (photons) generated by the motion of the electric field?

It is generally thought (see Special Relativity, A. P. French) that the magnetism we detect form an electric field, is related to relative motion with respect to that field. Specifiically a moving...

02 March 2018 9,852 7 View

Do clocks run at diffrenet speeds at difrrent latitudes , as according to STR?

Diffrent latitudes on Earth have different velocities relative to each other. This is because the velocity is less at other parallel latitudes than at the equator. Have experiments confirmed this...

03 April 2017 7,468 23 View

What really happens inside a black hole?

06 July 2016 2,530 15 View

What is the mechanism an electron can appear to gain relativistic mass in conventional SR?

In conventional textbook SR the mass of an object with rest mass m0, increases its relativistic mass m' by the formula m' = m0. sqrt(1-v^2/c^2). What is the proposed mechanism for this increase...

31 December 2015 2,045 33 View

What exactly is conformal time?

11 December 2015 3,419 7 View

What is the closest experimental value we have for the radius of the free electron?

The classical electron radius is well known and effectively represents the charge radius which is 2.82 X 10^-15 m. The "physical" radius of the free electron has yet to be determined...

11 December 2015 8,241 80 View

In what dimensional analysis can the powers of c ( the speed of light) be considered purely numerical?

10 November 2015 6,438 13 View

What is the speed of the electron spin assuming the classical spin model of the electron?

The spin of the the electron is known as h/2. We are told that this is not the classical spin primarily because the speed of the electron would need to far exceed the speed of light. What is the...

09 October 2015 5,190 11 View

What is the significance of the term h.c^4 or more specifically the term 8pi.h.c^4.alpha in relation to the electron?

In the study of the electron the term h.c^4, or more specifically the exact term 8pi.h.c^4.alpha seems to have a special significance. The question is what (dimensionally or otherwise) do either...

09 October 2015 6,709 10 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

What software programs can directly simulate Additive Manufacturing Directed Energy Deposition (DED)?

I understand there are a lot of software programs that can simulate DED by going through specific modeling, simulation, and commands. For me, that was time consuming and results were not accurate....

24 February 2021 4,428 3 View

I am looking for a simple software program to model 3D chemical bonds. The purpose is to generate high-quality graphical abstracts. Any suggestion?

Hello everyone: I am looking for a simple software program to model chemical bonds. The purpose is to generate a high-quality graphical abstract for a top leading journal in the field of...

23 February 2021 8,012 3 View

Which programs are to be used to register 2D image onto a 3D image data set?

I am trying to register a light micrograph onto a 3D CT data set, as I want to extract the corresponding image from the CT data set. Is there any software or program can do this accurately? I am...

21 February 2021 8,220 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View

How can I obtain Reaction Forces in ABAQUS?

I am trying to simulate a simplified version of a beam resting on 10 points using Abaqus. The solutions I want to obtain are the Reaction Forces in each resting point or area when applying a...

21 February 2021 3,075 2 View

How to convert 2D stack images to 3D to obtain surface area of nucleus?

I have 15 slices of the nucleus at different z-heights from confocal imaging. I would like to use these slices to reconstruct the 3D nucleus and ultimately estimate the surface area of the...

20 February 2021 6,967 1 View

How to get the vector of a specific vibration mode in phonon dispersion?

For example, I have this phonon dispersion(Fig. 1), and now I would like get vector of atoms which describes TA1 in P. I know v_sim can show vibrational animation of specific mode, but I do not...

20 February 2021 4,332 4 View

Has anyone used deep learning for 2D/3D REGISTRATION ?

I am a Master student in Biomedical (Bio-electrical) Engineering and work on " 2D-3D registration ( CT and X-Ray) as my thesis. I created DRR from CT and want use CNN( Convolutional Neural...

19 February 2021 6,354 3 View

PV system design. 3d modelling and Analysis?

I have been looking for a good cost-effective tool for 3D modelling a glass-glass solar module system. I was initially considering Skelion as a tool but it does not look very promising, a bit...

13 February 2021 8,126 1 View