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Writings & Records

Articles & Technical Notes

Long-form retrospectives, technical papers, and architectural post-mortems documenting what I learn.

Writing about a problem forces you to discover which parts of the system you didn't truly understand.

Chetraj Jaishi — Laboratory Notes

Latest Notes

4 published essays
Physics & MeasurementSep 2026 · 7 min read

How Do We Even Measure the Speed of Light?

From Rømer's moons-of-Jupiter timing in 1676 to Michelson's rotating mirror, to modern laser interferometry — tracing the ingenious experiments that pinned down one of nature's fundamental constants.

PhysicsSpeed of LightMeasurementHistory of ScienceOptics
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Solar & Nuclear PhysicsAug 2026 · 6 min read

Okay, But How Does Light Actually Come Out of the Sun?

Examining how nuclear fusion in the solar core converts mass into energy via the proton-proton chain, and how radiative transfer, thermal bremsstrahlung, and atomic transitions transport photons outward to the photosphere.

Solar PhysicsNuclear FusionPlasmaPhotonsThermodynamics
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Computer SystemsJul 2026 · 6 min read

From Vacuum Tubes to Modern Chips

How does a computer actually compute? Exploring the journey from 1804 on/off punch cards to 1940s vacuum tubes, relays, and early binary switching logic.

ArchitectureVacuum TubesHardware HistoryBinary Logic
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