berkeman's latest activity
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berkeman reacted to gentzen's post in the thread High School Reducing loss of energy for Lasers with
Informative.
No, high end masks are written by e-beam lithography, either by VSB (variable shaped beam) machines, or by electron multi-beam (grey... -
(Apologies if some of this was already said while I was typing it out... had to leave and come back to it...) In most cases when a...
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berkeman reacted to M4n90_L3m0n's post in the thread Undergrad Self-reference problem in MWI (13yo amateur, be gentle) with
Like.
Thanks for the detailed explanation!!! Through your explanation, I looked up some relevant materials and successfully came to understand... -
berkeman replied to the thread Other Committing to a major.You flunked two semesters of community college? If I'm reading that right, that's not a good sign of potential success at this time...
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berkeman reacted to bhobba's post in the thread Undergrad "The wavefunction never collapses" with Like.
With my mentor's hat on, please refrain from quoting long posts. Thanks Bill
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It seems from your post that you've already laid out a plan but you just don't know it. It seems you would like Mathematics, with a...
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berkeman reacted to Nugatory's post in the thread Undergrad Self-reference problem in MWI (13yo amateur, be gentle) with Informative.
”All branches exist” isn’t quite right, it’s better to say that there is a branch for every possible outcome, but violating the laws of...
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berkeman replied to the thread High School Reducing loss of energy for Lasers.Can you elaborate? Do you mean photolithography used in IC fabrication?
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Is it some sort of velcro type flap that goes over his laces? To stop the loops flying about when he is running? I had something similar...
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berkeman replied to the thread PF World Cup Chat 2026.What is that thing on Messi's shoe? This was from the great game yesterday versus Cape Verde.
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berkeman replied to the thread High School Reducing loss of energy for Lasers.I was at a photonics trade show many years ago, and as I walked down one of the aisles, I heard a "snap, snap" noise every few seconds...
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berkeman reacted to DaveE's post in the thread High School Reducing loss of energy for Lasers with Informative.
Do you mean the laser beam, or the entire laser? What's in the vacuum? There are some laser applications that require a vacuum, but...
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@sbrothy :wink:
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berkeman replied to the thread High School Reducing loss of energy for Lasers.@Josiah -- Please take care not to try to reopen a closed thread. Your previous thread on this question was closed because you veered...
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berkeman reacted to Astronuc's post in the thread M 7.5 Earthquake - 28 km SE of Yumare, Venezuela with Like.
There are usually foreshocks, but often not nearly as severe. Here what is rare is the occurrence of magnitude 7.2 then 7.5 in close...
