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Older Than deck / Inventions and everyday things

Visible-light LED

Demonstrated

1962

Nick Holonyak’s red LED glowed with visible light.

Sources and checks

Checked 2026-10-21: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source; for dates the quote is the year as printed, read in context.

“1962”University of Illinois Urbana-Champaign: source, retrieved 2026-10-21; quote re-found by the server check
“1962”National Inventors Hall of Fame: source, retrieved 2026-10-21; quote re-found by the server check
“1962”General Electric: source, retrieved 2026-10-21; quote re-found by the server check

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