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.
You can find the contact information for all three national credit bureaus in the United States. 1  Equifax â www.equifax.com To order your report, call: 800-685-1111 or write: P.O. 2  Box 740241, Atlanta, GA 30374-0241 To report fraud, call: 800-525-6285/ TDD: 800-255-0056 and write: P.O. 3  Box 740241, Atlanta, GA 30374-0241.ost large creditors report this information to all three national credit bureaus (CRAs). Some smaller lenders or merchants, however, may only report the information to one. For this reason, your report from each CRA may not be the same.