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Filming the Speed of Light at 10 Trillion FPS

The Slow Mo Guys · 42.1M views · 2019-03-27 · 13:06

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Overview

The Slow Mo Guys visit a lab with a camera capable of filming at 10 trillion frames per second, fast enough to see light travel. They show the setup and the resulting footage.

On Hacker News

Used as the standard reference whenever HN discusses filming light or ultrafast cameras.

Discussed on HN; no positive recommendation is recorded in this export · HN mentions 2019–2025

Topics

Everyday physics & science demosFundamental physics
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speed of lighthigh speed cameracaltechslow motionphotography

What people said

pbronez · 2025-10 · Reference

The slowmo guys did a video about a similar setup at CalTech [VIDEO] It’s super cool that AlphaPhoenix is able to get comparable results on his garage. These academic versions use huge lab bench optic setups. They wind up with technically higher quality results, but AlphaPhonix’s video is more compelling.

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westurner · 2025-10 · Reference

"Visualizing video at the speed of light — one trillion frames per second" (2011; MIT) [LINK] "Single-shot real-time femtosecond imaging of temporal focusing" (2018) [LINK] "Filming the Speed of Light at 10 Trillion FPS" (2019; The Slow Mo Guys) [VIDEO]

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rhdunn · 2025-08 · Reference

The slow mo guys did a video [1] at 10 trillion FPS. They also recently did another video [2] at 5,000,000 FPS. Their other videos vary between 50,000 FPS and 850,000 FPS. Edit: They mention in [2] that the Phantom camera they have can go to a 95ns exposure up to 1,750,000 FPS. [1] [VIDEO] [2] [LINK]

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Sources

Video by The Slow Mo Guys, played through YouTube.

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HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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