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Tuesday, November 9, 2010

Google celebrates 150th anniversary of X-rays with a doodle

Today google changed their logo on search today. The logo is an x-ray of 'Google' with bones, a key and a rubber duck.

The doodle is also animated and glows as users' mouse hovers certain letters.The second 'g' in the logo shows an underlay of pidgeon feathers and reminds us of the google prank announcement in 2002 when google said its page ranking system was determined by pigeon pecks.

A google executive, Marissa Mayer tweeted this morning "115th anniversary of the X-Ray on Google (with a shoutout to April Fools 2002 - PigeonRank - in the little 'g'):"

German physicist Wilhelm Röntgen is usually credited as the discoverer of X-rays because he was the first to systematically study them, though he is not the first to have observed their effects. He is also the one who gave them the name "X-rays", though many referred to these as "Röntgen rays" for several decades after their discovery and to this day in some languages, including Röntgen's native German, and Swedish. Röntgen called them 'X' rays because he didn't know what type of radiation they were.

X-rays are generated by an X-ray tube, a vacuum tube that uses a high voltage to accelerate the electrons released by a hot cathode to a high velocity. The high velocity electrons collide with a metal target, the anode, creating the X-rays.