Other Drugs. Drugs used for treating epilepsy, such as phenytoin and carbamazepine, can reduce thyroid levels. Certain antidepressants may cause hypothyroidism, although this is rare. Interferons and interleukins are used for treating hepatitis, multiple sclerosis, and other conditions.
Visible light has frequencies ranging from 4*10 14 Hz to 8*10 14 Hz (400 THz to 800 THz) and wavelengths from 3.8*10 -7 m to 7.5*10 -7 m (380 nm to 750 nm). Red light has the lowest frequency (longest wavelength) and violet light has the highest frequency (shortest wavelength) of visible light.
Colors of Visible Light. Within the narrow band of visible light, the different wavelengths are perceived by people as different colors. The shortest wavelengths are perceived as violet and the longest wavelengths are perceived as red. There are seven wavelength ranges within the visible spectrum that each correspond to a different color. The colors fall in an order commonly referred to with the acronym ROYGBIV. ROYGBIV can aid in remembering the order of the colors: red, orange, yellow, green, blue, indigo, and violet.