Wood's light

light (līt) electromagnetic radiation with a range of wavelength between 3900 (violet) and 7700 (red) angstroms, capable of stimulating the subjective sensation of sight; sometimes considered to include ultraviolet and infrared radiation as well.

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idioretinal light  the sensation of light in the complete absence of external stimuli.

intrinsic light  the dim light always present in the visual field.

polarized light  light of which the vibrations are made over one plane or in circles or ellipses.

Wood's light  ultraviolet radiation from a mercury vapor source, transmitted through a nickel-oxide filter (Wood's filter, or glass), which holds back all but a few violet rays and passes ultraviolet wavelengths of about 365 nm.

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Wood's light

n.

Ultraviolet light produced by Wood's lamp.

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Wood's light.

See ultraviolet lamp.

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Wood's light, lamp

ultraviolet radiation from a mercury vapor source, transmitted through a nickel oxide filter (Wood's filter), which holds back all but a few violet rays and passes ultraviolet wavelengths of about 365 nm; used in diagnosis of fungal infections of the skin and to reveal the presence of porphyrins and fluorescent minerals.