Ultraviolet radiation, X-rays and gamma rays all have wavelengths that are shorter than visible light. The ultraviolet spectrum ranges from 400 to 10 billionths of a meter, X-rays from about 10 billionths to 10 trilliont... More » Science Physics Optics & Waves

Photosynthesis is most efficient at light wavelengths between 400 and 500 nanometers and 600 to 700 nanometers. The green pigment, chlorophyll, restricts the efficiency of photosynthesis. More » Science Biology Botany

In the visible light spectrum, the wavelength of red light ranges from 622 to 780 nanometers. Red light has the longest wavelength and the shortest frequency. Violet light, which has the shortest wavelength, is at the ot... More » Science Physics Optics & Waves
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Electromagnetic radiation between 8*10^14 to 3*10^16 Hz (800 THz to 30 PHz) and wavelengths from 10^-8 m to 3.8*10^-7 m (10 nm to 380 nm) are ultraviolet rays. The frequency of waves is inversely proportional to their wa... More » Science Physics Optics & Waves

Blue-violet light on the visible light spectrum can cause damage to retina cells, increasing one's risk of developing age-related macular degeneration, explains Essilor. Macular degeneration is an eye condition in which ... More » Science Physics Optics & Waves

Ultraviolet radiation is divided into three categories: UVA, UVB and UVC, only one of which is blocked by conventional window glass. UVA has the longest wavelength, followed by UVB and UVC. More » Science Physics Optics & Waves

Gamma rays have the shortest wavelength of the electromagnetic spectrum, followed by X-rays and ultraviolet rays. Slightly longer wavelengths of electromagnetic radiation, between 4000 and 7000 angstroms in length, are v... More » Science Physics Optics & Waves