Cod liver oil - a potentially toxic source of Vitamin A: Hypervitaminosis A can result from ingestion of too much vitamin A from diet, supplements, or prescription medications.
This visible light region consists of a spectrum of wavelengths that range from approximately 700 nanometers (abbreviated nm) to approximately 400 nm. Expressed in more familiar units, the range of wavelengths extends from 7 x 10 -7 meter to 4 x 10 -7 meter.
The visible light spectrum ranges from red light (620 nm) to violet light (480nm). Because wavelength is inversely proportional to energy, violet light posseses the most energy while red light possesses the least (as measured in photons).