Articles & Explanations
Rigorous, accessible physics articles authored by Traian Anghel exploring the intersection of optics, acoustics, and sensory physiology.
How Wavelength Becomes Color: The Physics Behind CIE 1931 and Digital Displays
Trace the complete scientific pipeline from electromagnetic spectral power distribution through human cone photoreceptors (L, M, S), the 1931 standard observer, and sRGB gamma companding.
Why A4 is 440 Hz: The Physics, History, and Acoustics of Concert Pitch
The historical journey from diapason pitch variations across Baroque cathedrals to the 1939 London conference and the ISO 16:1975 international tuning standard.
Color Temperature Is Not a Wavelength: Kelvin, CCT & Duv Explained
Learn why a white-light source has no single wavelength, how the Planckian locus gives correlated color temperature its meaning, and what Duv reveals when two lamps share the same kelvin rating.
Why Bass Needs Space: Wavelengths, Room Modes & Speaker Placement
Connect long bass wavelengths to standing waves, nodes, boundary effects, listening-position changes, acoustic treatment, and the problems equalization cannot solve.