In the early 20th century, this technology powered the Tricho System, which was used at beauty salons.  
In the early 20th century, this technology powered the Tricho System, which was used at beauty salons.  Philipp Lenard, who once called Einstein a "publicity-seeking Jew" claimed he was the "mother" of this technology, a position backed by Nazi historians.  In 1957, Pennsylvania became the first state to pass a law banning people in the (*) footwear business from using this technology.  The Uhuru satellite was the first to make use of one form of this technology.  The discoverer of this technology was using a Crookes tube and noticed how a fluorescent screen of barium platinocyanide glowed in unusual circumstances.  This technology was popularized through a photograph of the hand of a woman wearing a ring.  It powers the 620 Dual View by Rapiscan used at airports.  For 10 points, name this technology discovered by Wilhelm Konrad Rontgen, now used to check for broken bones.
In the early 20th century, this technology powered the Tricho System, which was used at beauty salons.  
x-rays [or x-ray crystallography or x-ray astronomy or x-ray machines or x-ray tubes; accept Rontgen radiation until mentioned]