Computer hard disc drive - arresting motion Science Video
Computer hard disc drive - arresting motion
Ref: 000-0114-01Description:
The disc of a partially dismantled computer hard disc drive being illuminated with a high speed stroboscope. As the flash frequency of the stroboscope is lowered to 7,200fpm the white mark on the disc appears stationary. This is due to the mark being illuminated once each rotation and hence the rotational speed of the disc. 