a jackson young, jr

Science Dictionary
Young   (yŭng)  Pronunciation Key 
British physicist and physician who is best known for his contributions to the wave theory of light and his discovery of how the lens of the human eye changes shape to focus on objects of different distances. He also studied surface tension and elasticity, and Young's modulus (a measure of the rigidity of materials) is named for him. He is also credited with the first scientific definition of the word energy.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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