Biconvex spherical lens Updated 2025-07-16
Each side is a sphere section. They don't have to have the same radius, they are still simple to understand with different radiuses.
The two things you have to have in mind that this does are:
- This is for example why you can use lenses to burn things with Sun rays, which are basically parallel.Conversely, if the input is a point light source at the focal length, it gets converted into parallel light.
- image formation: it converges all rays coming from a given source point to a single point image. This amplifies the signal, and forms an image at a plane.The source image can be far away, and the virtual image can be close to the lens. This is exactly what we need for a camera.
Big O notation Updated 2025-07-16
Big tech Updated 2025-07-16
Bijection Updated 2025-07-16
Football Updated 2025-07-16
Spin-statistics theorem Updated 2025-07-16
Video "The Biggest Ideas in the Universe | 17. Matter by Sean Carroll (2020)" at youtu.be/dQWn9NzvX4s?t=3707 says that no one has ever been able to come up with an intuitive reason for the proof.
Bill Nye Updated 2025-07-16
The problem as with many well known science communicators is that he falls too much on the basic side of the the missing link between basic and advanced.
Binet (École Polytechnique) Updated 2025-07-16
Biochemistry course of the University of Oxford Updated 2025-07-16
BioCyc promoter database Updated 2025-07-16
E.g. for E. Coli K-12 MG1655: biocyc.org/group?id=:ALL-PROMOTERS&orgid=ECOLI For some context see e. Coli K-12 MG1655 gene thrL + e. Coli K-12 MG1655 gene thrA + thrB + thrC all of which are in the same transcription unit.
Bisection (software engineering) Updated 2025-07-16
One of the Holiest age old debugging techniques!
Git has some helpers to help you achieve bisection Nirvana: stackoverflow.com/questions/4713088/how-to-use-git-bisect/22592593#22592593
Obviously not restricted to software engineering alone, and used in all areas of engineering, e.g. Video "Air-tight vs. Vacuum-tight by AlphaPhoenix (2020)" uses it in vacuum engineering.
for loop Updated 2025-07-16
One theoretical motivation for its existence is that it has the fundamental property that we are immediately certain it will terminate, unlike while loops with arbitrary conditions.
Primitive recursive functions are the complexity class that divides those two.
Real coordinate space of dimension four Updated 2025-07-16
RE (complexity) Updated 2025-07-16
Condensed matter university course Updated 2025-07-16
Multiplication Updated 2025-07-16
Quantum mechanics experiment Updated 2025-07-16
Atoms exist and last for a long time, while in classical electromagnetic theory punctual orbiting electrons should emit radiation quickly and fall into the nucleus: physics.stackexchange.com/questions/20003/why-dont-electrons-crash-into-the-nuclei-they-orbit
In other sections:
Bibliography:
Regulate the fuck out of advertising Updated 2025-07-16
It should be illegal to give someone money to advertise your product.
We should just use tags and upvote-based algorithms.
TODO find Sergey Brin quote bout advertising being a form of perverting search engine ranking neutrality. In other words, there are neutral metrics to what people find good, like links and upvotes. And then advertising is a way to pervert that to someone's profit.
Sometimes Ciro Santilli thinks advertising should be on-subscription only, but that is too restrictive, e.g. imagine the local business owner who wears a t-shirt of their business.
Replacement of master and slave terminology from technology Updated 2025-07-16
The IETF was a notable one: www.nytimes.com/2021/04/13/technology/racist-computer-engineering-terms-ietf.html
- developers.google.com/style/word-list (archive) Google's avoid word list is a masterclass in 2020's political correctness
HIV Updated 2025-07-16
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