Light at 480 THz480 THz - Red LightA frequency of 480 THz corresponds to a wavelength of approximately 625 nm in vacuum, in the orange-red region of the visible spectrum. Digital displays can only approximate a monochromatic spectral color within the sRGB gamut.Formula: λ(nm) = 299792.458 / f(THz).
Sound at 440 Hz440 Hz - Concert A (A4)Standard concert pitch uses A4 = 440 Hz (ISO 16), although historical and specialized ensembles may use other references. Its wavelength in air is approximately 78 cm; in 12-TET it is MIDI note 69, and A5 is 880 Hz.Formula: f = 440 * 2^((midi-69)/12).
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CIE 1931 2-degree Standard Colorimetric Observer, spectral wavelength to sRGB synthesis, photon energy in electron-volts, and WCAG contrast validation.
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12-Tone Equal Temperament pitch frequencies, ISO 16:1975 A4=440Hz concert pitch, Web Audio synthesizer, BPM studio delays, and NASA acoustic velocity.
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