The full range of wavelengths for light is called the electromagnetic spectrum.. The image and table below show which wavelength ranges in the electromagnetic spectrum correspond to which types of light. Constants. 1  Home. 2  Physics Tools. 3  Contact Us. 4  Forums.
Social Security benefits account for 50 percent or more of retirement income for three out of five beneficiaries receiving Social Security benefits who are age 65 or older. Nearly one out of four received all of their income from Social Security in 2012.
Social Security retirement age. To help improve Social Security's finances, Congress decided that the retirement age should be raised to 67. This is phased in gradually, starting with retirees who were born in 1955. For retirees born in 1954 or earlier, full or normal retirement age is 66 years of age. After that, two months are added to the full retirement age for every year until 1960, when the full retirement age reaches 67. With that in mind, here's a chart that can help you determine your full retirement age: