MARK SYKES / SCIENCE PHOTO LIBRARY MARK SYKES / SCIENCE PHOTO LIBRARY
Video cassette. Simulated X-ray of a video cassette. This cassette contains a 250- metre-long spool of magnetic tape (left) onto which audio- visual information can be recorded and played back by using a video cassette recorder (VCR, not seen). As the tape is played through the machine, it is wound up on the right-hand spool.
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