William Henry Bragg was an English physicist and chemist, born on July 2, 1862. He is best known for his work in the field of X-ray crystallography, which involves using X-rays to determine the structure of crystals. Along with his son, William Lawrence Bragg, he developed the Bragg's Law, a fundamental principle that describes how X-rays are diffracted by crystal lattices. In 1915, William Henry Bragg was awarded the Nobel Prize in Physics for his contributions to the understanding of crystal structures. His research has had a lasting impact on various scientific fields, including chemistry, materials science, and biology, helping scientists to explore the atomic structure of numerous substances.