Publisher: Edinburgh Instruments; Techcomp hosts the inspected reprint.
This source is credited to an organization.
Cited passages: What are Absorption, Excitation and Emission Spectra?, Excitation Spectra, PDF pp. 2–3, Figures 3–4; Emission Spectra, p. 4, Figures 5–6.
What is the Stokes Shift? by Edinburgh Instruments by Codex 0 Created 2026-10-13 Updated 2026-11-05
This source is credited to an organization.
Cited passages: Stokes Shift in Fluorescence Spectroscopy, Figure 4 and its discussion; Stokes Shift in Fluorescence Spectroscopy, Figure 4 and relaxation discussion; Stokes Shift in Fluorescence Spectroscopy, definition, spectral-coordinate caveat, Figures 2 and 4.
Foundational Magnetic Susceptibility by TeachSpin by Codex 0 Created 2026-10-13 Updated 2026-11-05
Publisher: TeachSpin, Inc.
This source is credited to an organization.
Cited passages: TeachSpin, Foundational Magnetic Susceptibility, Instrument: Absolute calibration method and Diamagnetism; TeachSpin, Foundational Magnetic Susceptibility, Instrument: The Gouy Method and “Weighing the magnet” method; Specifications: magnet and sample dimensions.
Collection of sources; individual chapter authors and dates are recorded below.
Publisher: Pergamon Press Inc.
Cited passages: Abstract, printed p. 1; section III, pp. 4-5; section IV, pp. 6-7; note added in proof, p. 7, and Figure 3, p. 8: spectral agreement, model limitations and updated galaxy-contamination interpretation; Section II, printed p. 2: instrument, grating, sampling, resolution, two apertures, sky subtraction and interleaving.
Gravitational Lensing by Matthias Bartelmann by Codex 0 Created 2026-10-13 Updated 2026-11-05
Published in Classical and Quantum Gravity.
The arXiv preprint was submitted on 19 October 2010. Journal venue: Classical and Quantum Gravity; journal DOI: 10.1088/0264-9381/27/23/233001.
Cited passages: Section 1.2, printed p. 2: geometrical optics, weak fields and slowly moving lenses; compact-object near-field propagation excluded; Section 2.2, printed pp. 15-16, equations (100)-(110): point-mass model, two roots, critical circle and magnification.
arXiv version 1 was submitted on 3 June 1996; version 2 was revised on 2 October 1997. The date printed by the dynamically regenerated PDF is not used as a publication date.
Cited passages: Section 2.1.3, pp. 8-9, equations (13)-(15), including the warning that lens-source angular diameter distance is not the difference of the observer distances.
Radiative Transfer lecture notes by John E. Greivenkamp by Codex 0 Created 2026-10-13 Updated 2026-11-05
Publisher: University of Arizona (institutional lecture host).
Lecture notes for OPTI-201 and OPTI-202; the slides carry copyright 2018.
Cited passages: Section 22, slides 22-18 and 22-20: lossless radiance conservation and invariant basic radiance L/n²; Section 22, slides 22-3–22-4, solid-angle element and exact cone solid angle; slide 22-7, projected-area hemisphere factor.
Étendue (Photon Snacks) by R. John Koshel by Codex 0 Created 2026-10-13 Updated 2026-11-05
Publisher: University of Arizona, Wyant College of Optical Sciences (institutional host of Photon Snacks / Light Bytes).
Cited passages: Étendue, p. 1, equation (1.1): refractive-index-weighted projected-area integral; Étendue, pp. 1–2, lossless-system and entrance-pupil restrictions; p. 3, Figure 1, preserved generalized phase-space element.
Publisher: University of Iowa.
This source is credited to an organization.
Cited passages: Demonstration 6H35.15, Equipment and Procedure: crystals, polarizers, printed overhead transparency, two sets of words and selective extinction; final note on natural defects.
Publisher: MIT OpenCourseWare (institutional hosting/publishing platform).
Cited passages: §2.8.1, printed pp. 154–156, equations 2.406–2.413: uniaxial tensor and direction-dependent extraordinary index; §2.8.3, printed pp. 157–158, equations 2.414–2.419: Poynting direction and walk-off; §§2.8.2–2.8.3, printed p. 156, equations 2.410–2.413 and longitudinal electric-field discussion.
Additional verified locator: Chapter 7, printed pp. 313–314 (PDF pages 311–312), Figure 7.19 and equations 7.10–7.12. Linear and ring laser geometries are distinguished; resonance is a round-trip phase condition and adjacent-mode spacing is the inverse round-trip group delay. The ring counts one full cavity circuit rather than adding the linear cavity's extra factor of two. www.ocw.mit.edu/courses/6-974-fundamentals-of-photonics-quantum-electronics-spring-2006/bf3bdeb971819ddc9c68719d28bb2745_classnotes.pdf
§2.6.2, printed p. 116, equation 2.303 and Figure 2.82: equal-radius mirrors separated by their curvature radius have a one-way Gouy phase difference of pi/2; their confocal spectrum has degenerate transverse-order families and interleaved resonances. The PDF page index is 120.
Additional verified locator: §2.6.2, printed pp. 114–116 (PDF indices 118–120), equations 2.297–2.303 and Figures 2.80–2.82: Hermite-Gaussian transverse fields, their Gouy phase and the resonator frequency condition. ocw.mit.edu/courses/6-974-fundamentals-of-photonics-quantum-electronics-spring-2006/bf3bdeb971819ddc9c68719d28bb2745_classnotes.pdf
HCl and DCl IR absorption spectra by Jonathan Gutow by Codex 0 Created 2026-10-13 Updated 2026-11-05
Publisher: PIPER: Resources for Teaching Physical Chemistry, hosted at Coe College.
Cited passages: Gutow, HCl and DCl IR absorption spectra, dataset description: instrument, path length, pressure and resolved chlorine isotope peaks.
Publisher: Truman State University ChemLab.
Cited passages: McCormick, Introduction; Experimental, Laboratory Component, Figures 1–2 and background/peak-picking paragraphs; Analysis and Discussion, first three paragraphs.
Published in Nature 419, pages 51–54.
Cited passages: Greiner and others, manuscript pp. 3–4: preparation and switching; p. 7, Methods: wavelength, beam waists and lattice geometry; Manuscript p. 4 and figure 2 caption on p. 11: flight and image extraction; figure 3 caption on p. 12: readout limitations; figures 4–5 captions on pp. 13–14: final-depth and initial-depth comparisons; Manuscript pp. 2–3, equations (1)–(2): isolated-well Hamiltonian and number-state phase evolution.
Published in Physical Review E 75, issue 5, 050102(R).
Cited passages: Talkner, Lutz and Hänggi, p. 2, equations (8)–(10): initial energy outcome, conditional transition probability and two-measurement work distribution; Talkner, Lutz and Hänggi, p. 2, paragraph before equation (7): sudden switch gives the identity time-evolution operator.
Published in Reports on Progress in Physics.
Cited passages: Seifert, 2012, §3.3.2, p. 22, Eq. (65); §4.4.3, p. 28, Eqs. (93)–(95): finite stationary total entropy and endpoint-conditioned medium entropy.
Published in Physical Review E.
Cited passages: Crooks, 1999, Eq. (3) and derivation from Eqs. (10)–(11); Crooks, 1999, Eqs. (5)–(7), (9)–(11): reversal, equilibrium weights and work relation.
Cited passages: Seifert, 2005, Eq. (19) and following paragraph: actual final distribution versus final equilibrium distribution; Seifert, 2005, Eqs. (14)–(18) and (30): conditional and full path weights, endpoint distributions, total entropy; Seifert, 2005, Eqs. (17)–(18): integral relation and its mean inequality.
Publisher: Kluwer Academic Publishers (printed copyright/publisher line verified).
Published in Solar Physics, 153, 91–114.
Cited passages: §2, p. 93, instrumental compilation: slit dimensions, double pass, detectors, sampling and drift-curve layout; p. 113, acknowledgements identifying the telescope; §2, pp. 93–94, precautions (1), (6)–(8); §3.1, p. 94, two-step limb positions and seeing estimate.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact