The father of five children had won a toy at a raffle. He called his kids together to ask which one should have the present.
“Who is the most obedient?” he asked. “Who never talks back to mother?
Who does everything she says?”
Five small voices answered in unison.
“Okay, dad, you get the toy.”
Charles BarklaBorn 7 Jun 1877; died 23 Oct 1944 at age 67.Charles Glover Barkla was an English physicist who was awarded the Nobel Prize for Physics in 1917 for his work on X-ray scattering. This technique is applied to the investigation of atomic structures, by studying how X-rays passing through a material and are deflected by the atomic electrons. In 1903, he showed that the scattering of x-rays by gases depends on the molecular weight of the gas. His experiments on the polarization of x-rays (1904) and the direction of scattering of a beam of x-rays (1907) showed X-rays to be electromagnetic radiation like light (whereas, at the time, William Henry Bragg who held that X-rays were particles.) Barkla further discovered that each element has its own characteristic x-ray spectrum.« |
