prism

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Glenn Greenwald full interview on Snowden, NSA, GCHQ and spying - Newsnight

Glenn Greenwald full interview on Snowden, NSA, GCHQ and spying - Newsnight

404K views • 13 years ago

BBC Newsnight's exclusive interview with journalist Glenn Greenwald about Edward Snowden, the PRISM revelations, and mass surveillance by the NSA and GCHQ.

This Invention Made Disney MILLIONS, but Then They LOST It!

This Invention Made Disney MILLIONS, but Then They LOST It!

7.3M views • 2 years ago

Corridor Crew tracks down Disney's lost sodium vapor prism process, used for Mary Poppins-era transparency mattes. They explain how a narrow sodium wavelength and a beam splitter enabled better compositing than green screen.