What is a Phonon?

The common answer to this question is that a Phonon is the vibration of the lattice. My concern is whether or not this is limited to the vibration of the lattice? Are Phonons not in general waves...

04 May 2018 1,635 7 View

What is the maximum magnetic flux density measured in the lab currently?

I will be happy if you gave your response in SI units. Give citation if possible. Thank you in advance.

09 October 2016 3,262 4 View

Quarks: Why Three Inside the Proton and Why Fractional Charges?

I will be interested to hear your views on the work I have done here. I proposed three curved spacetime Dirac equations in 2008 in the Journal Foundations of...

02 March 2016 9,995 0 View

What does it mean to have Orthogonal Quantum States?

I am working a version of the Dirac equation. This version have only two solutions, one for the positive energy state and the other for the negative energy state. I find that this version of the...

01 February 2016 4,722 14 View

Neutrino 'flavours' win physics Nobel Prize? What is your take?

The coveted lifetime prize in physics for 2015 has been awarded, what is your take? http://www.bbc.com/news/science-environment-34443695

09 October 2015 5,277 0 View

Can the Pioneer Anomaly be caused by mass accretion from the the Interplanetary Medium?

For quite sometime now, I have thought about the Pioneer Anomaly, I have read a number of papers on this, and in all my searches, I have not come across a suggestion as that presented in the...

07 August 2015 7,189 0 View

Is the Big Bang Theory correct on its untested (and untestable) hypothesis that all matter in the Universe was created at an instant?

01 February 2015 9,533 5 View

Is Relativity's Equal Footing Treatment of Space and Time Correct in its Entirety?

As well known, the General Theory of Relativity (GTR) was introduced along with the principle that there exists no system of coordinates that is preferred, but that any arbitrary system of...

01 February 2015 3,916 12 View

Is there a Dirac equation for the Proton or Neutron?

To the best of my knowledge, because the Dirac equation explains very well the gyromagnetic ratio of the Electron, it is typically considered to be an equation for the Electron. There seems to be...

31 December 2014 6,205 15 View

Do you know of any non-Euclidean geometries that preserve both the length and the angle upon parallel transport?

For example, Riemann geometry is a non-Euclidean geometry that only preserves the length upon parallel transport. I have come up with a geometry that preserves both the angle and length upon...

10 November 2014 7,773 10 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Is there any effect of different colours of light (white, red, yellow, blue etc.) on the rate of photosynthesis? If yes, why?

Light is inevitable for the process of photosynthesis reaction. Naturally sunlight plays the vital role for this process. Light may be of different colours like white, red, yellow, blue etc....

02 March 2021 7,890 2 View

Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

Anyone found any research papers on solar furnace design calculations (for solar concentration)?

I am thinking about working on solar furnace with heliostats that concentrate sunlight and heat molten salt, but currently no luck with research. Not a lot of papers based on the subject. (check...

01 March 2021 5,023 5 View

How to size battery banks?

I am designing a small grid connected solar PV power-plant. As the battery's capacity is specified in Ah and demand in kWh. What is the best way to size the battery bank? I have battery price in...

28 February 2021 1,638 3 View

How to design a boost converter for a mppt controller?

I have a doubt on how to select the inductor and capacitor value when I want to implement MPPT controller. This is because we always take a maximum output voltage and current but in this case, we...

28 February 2021 3,637 2 View

In an eye with Tyndall, does each dot correspond to an individual cell?

When you observe the presence of Tyndall in an inflamed eye: Does each of the small floating dots correspond to an individual cell or to an aggregate of cells? Does a conventional slit lamp have...

27 February 2021 6,326 2 View

How to sample data to increase presence of solar panels in the images?

I am working on creating deep neural network on geospatial dataset and wanted to know how to do the sampling so that I can increase the presence of solar panels in the images. I cannot use entire...

25 February 2021 3,936 6 View