Behind the Mask: The Rise of Leslie Vernon, a 2006 comedy/horror film
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The outer glass allows the light generated by the phosphor out of the monitor, but (for color tubes) it must block dangerous X-rays generated by the impact of the high energy electron beam.
Magnets should never be put next to a color CRT, as they may cause magnetization of the shadow mask, which will cause incorrect colors to appear in the magnetized area and may be expensive to have corrected.
This coil creates a brief, alternating magnetic field from standard 50 or 60 Hz household power upon power-up which decays in strength as a resistor in the circuit increases resistance with its increasing temperature as a result of the current passing through it.