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How a TV Works in Slow Motion - The Slow Mo Guys

The Slow Mo Guys · explainer · Watch on YouTube

Audio & video engineeringEveryday physics & science demos

What it is

The Slow Mo Guys film a TV and screens with a high-speed camera to show how displays build an image. The footage includes CRT-style scanning and how pixels light up over time.

Why Hacker News recommends it

Frequently linked as visual proof of how a CRT's raster scan and phosphor decay work.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2022, last 2026

What HN commenters said

  1. “This YouTube video by "The Slow Mo Guys" shows this in action”

    Slow Mo Guys show the CRT single-dot raster scan in action.

    retrac, 2025-07 · Recommendation · in “How does a screen work?”

  2. “This video has some great slow-mo of CRTs”

    Great slow-motion footage of CRT scanning and phosphor trails.

    kevincox, 2026-03 · Recommendation · in “JPEG Compression”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: crt, raster scan, slow motion, phosphor persistence, screens

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