Recent content by qnach

We all know how to google and look at wiki. There is really no need to give a wiki link. Please note, this page as well as other books all mentioned only direct and indirect band gap in semi-conductor without discussing what I asked!!!

I learnt direct and indirect band gap in semi-conductor books. Is direct and indirect band gap also occurs in other solids?

i have tried to use Zotero but it seem foreign to me. i tried to import papers and book but it seem to copy everything into its directory which occupied huge space. did i made any mistakes?

I have used Mendeley for 10 years. But it is extremely slow. Every single click will take it 5 min. or so.... I have about 8500 references in it, and I need to work with LaTex and WORD. Is there other reference manager can I use?

I tried to obtain this paper https://www.nature.com/articles/1781449a0 But why has it no title as you said "The Question of Correlation Between Photons in Coherent Light Rays"

OK Stern-Glash is not (Sorry I am very confused). It is not even an interferometry. But how about Michelson-Morley and Mach-Zehnder?

OK. Here is an example that saying HBT measures intensity https://physicstoday.aip.org/news/glauber-hall-and-hansch-share-the-2005-nobel-prize-in-physics on page 19 (the first page of that article) upper-right corner..... the Hanbury Brown–Twiss (HBT) apparatus measured the correlation in the...

This is the Mach-Zender interferometer I know of. Is it one source or two sources?

This is the Michelson-Morley interferometery I know of. Is it one source or two sources?

I read Hanbury Brown and Twiss's experiment is using one beam but split into two to test their correlation. It said the traditional correlation test were using two beams........ This confused me, sorry. All the correlation tests I learnt such as Stern-Gerlash are using one beam? (Sorry if I am...

I have encountered the name "sum rules" in many places, such as EM, acoustics,... But I understand none. In what kind of situation will a sum rule occurs? What does it said exactly?

TL;DR Summary: The theory for ears are well developed so far. Is there a more authorative book or paper? Where can I find a good book or a paper?

The friction law I learnt in high-school is Coulomb law, to my understanding. But what is Stribeck law? What is the difference from Coulomb's law?

There are differential cross section, double differential cross section, triple DCS. What are the difference, and why is the names? Thanks.

Summary:: I remember seeing somewhere that people said Lamb's Hydrodynamics is so dry that the reader cannot see any water but drawn in a desert. But where did it come from ? I remember seeing somewhere that people said Lamb's Hydrodynamics is so dry that the reader cannot see any water but...