ohwilleke's latest activity
-
ohwilleke replied to the thread High School Where does the figure for a proton's rest mass come from?.It is also worth noting that the commonly quoted figure probably doesn't come from a single experiment, and it isn't necessarily the... -
ohwilleke reacted to DaveC426913's post in the thread High School Where does the figure for a proton's rest mass come from? with
Like.
It is a notation. Specifically, scientific notation - a way of conveniently representing large and small numbers. 2x103 is the same as... -
ohwilleke reacted to recniabsal's post in the thread High School Where does the figure for a proton's rest mass come from? with
Haha.
It is a calculation. See that multiplication symbol in-between? -
ohwilleke reacted to PeterDonis's post in the thread Undergrad Is Vacuum Decay from a False to True State Impossible or Just Unlikely? with Like.
If there's energy present, it isn't the true vacuum state.
-
ohwilleke reacted to PeterDonis's post in the thread Undergrad Is Vacuum Decay from a False to True State Impossible or Just Unlikely? with Like.
Not really, no. It argues that, in a certain kind of quantum gravity model, if you start with de Sitter spacetime (i.e., a positive...
-
ohwilleke reacted to Demystifier's post in the thread High School Electron absorbs photon, but what happens to the photon? with Like.
"Electron absorbs photon, but what happens to the photon?" It gets destroyed, after the absorption the photon does not longer exist.
-
ohwilleke reacted to PeroK's post in the thread High School Electron absorbs photon, but what happens to the photon? with
Skeptical.
Also, an electron cannot absorb a photon. It would violate energy-momentum conservation. An atom, however, can absorb a photon. The... -
ohwilleke reacted to Nugatory's post in the thread High School Electron absorbs photon, but what happens to the photon? with Like.
It doesn’t. The wave-particle duality idea, that things would act like a wave until they’re observed and then start acting like a...
-
ohwilleke reacted to CrysPhys's post in the thread Other Is having bad resources from university normal? with Like.
What you describe is not the norm for decent universities. Was the math major you consulted a student at the same university, or a...
-
ohwilleke reacted to Hornbein's post in the thread What did you do with your old college textbooks? with
Wow.
I have a friend who has so many books that he had to get his house reinforced to bear the weight. -
ohwilleke reacted to Herman Trivilino's post in the thread What did you do with your old college textbooks? with Like.
In 1993 my immediate predecessor John Hubisz "retired" to teach in a different state, he had a building constructed to serve as his...
-
ohwilleke reacted to WWGD's post in the thread What did you do with your old college textbooks? with Like.
Rip Borders Books. I so miss the days of browsing through their shelves and bring books to their coffee shop or sitting on comfortable...
-
ohwilleke replied to the thread What did you do with your old college textbooks?.Three plus decades later, I still have almost all of them (and even consult them now and then), over the objections of other members of...
-
ohwilleke reacted to Esim Can's post in the thread Graduate How to fix Relativistic QM so it's consistent? with Like.
If a negative energy appears somewhere, it is always an indication of a direction problem, or in other words a geometric problem, which...
-
ohwilleke reacted to renormalize's post in the thread Graduate How to fix Relativistic QM so it's consistent? with Like.
The following is taken from Bjorken and Drell, Relativistic Quantum Mechanics (1964), pp. 5-6: So the problem with the Klein-Gordon...