In optics, refraction occurs when waves travel from a medium with a given refractive index to a medium with another at an angle. At the boundary between the media, the wave's phase velocity is altered, usually causing a change in direction.Its wavelength increases or decreases but its frequency remains constant.y measuring the angle of incidence and angle of refraction of the light beam, the refractive index n can be determined. Refractive index of materials varies with the frequency of radiated light. This results in a slightly different refractive index for each color.
If you suspect Medicare fraud please report it by phone at 1-800-447-8477 (1-800-HHSTIPS), or E-Mail at HHSTips@oig.hhs.gov. To report Medicaid fraud in North Carolina, call the North Carolina Medicaid Investigations Division at 919-881-2320.
Help fight Medicare fraud. Medicare fraud wastes a lot of money each year and results in higher health care costs and taxes for everyone. There are con artists who may try to get your Medicare Number or personal information so they can steal your identity and commit Medicare fraud. Guard your Medicare card like itâs a credit card. Give your Medicare Number only to people you know should have it.