In classical physics, the diffraction phenomenon is described as the interference of waves according to the HuygensâFresnel principle. These characteristic behaviors are exhibited when a wave encounters an obstacle or a slit that is comparable in size to its wavelength.iffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, X-rays and radio waves.
Voya Financial. Voya Financial is an American financial, retirement, investment and insurance company based in New York, New York. Voya began as ING U.S., the United States operating subsidiary of ING Group, which was spun off in 2013 and established independent financial backing through an initial public offering. In April 2014, the company rebranded itself as Voya Financial. Voya's predecessors had first entered the U.S. market in the 1970s.
The financial services giant's name change is only the latest step in a large scale re-branding effort that's been going on since November 2012, when its Dutch parent ING Groep NV said it would spin off the U.S. unit in an initial public offering. ING U.S. debuted on the New York Stock Exchange on May 2, 2013, as VOYA. Today is the first day that ING U.S. will market itself as Voya on press materials and other items.