Electronics: X Rays in the Living Room

Most people know that they can get a severe electric shock if they recklessly poke into the back of an operating TV set, where high-voltage components are placed out of harm's way. But until recently, few were aware that the same high voltages may pose a more subtle threat: they can produce X rays that, if improperly shielded, endanger viewers sitting unusually close to the set.

The X ray-producing potential of TV sets first came to public attention in May, when the General Electric Co. announced that it had discovered excessive X-ray emissions from some of its large-screen color TV...

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