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.
Each frequency gives a slightly different visible color. Not only are the light frequencies much higher, but the highest one is only about twice the lowest one. The sound frequencies are much lower, and the highest one is a thousand times higher than the lowest one.