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.
To report Medicare fraud, waste or abuse, call Rhode Island SMP at 462-0560. Quality Partners of Rhode Island, 235 Promenade Street, Suite 500, Providence, RI 02908 investigates complaints of improper or inadequate care and works to improve the quality of care for Medicare beneficiaries. Call 1-800-662-5028 or 528-3200.