An ultraviolet lamp which allows a doctor to see fluorescence , e.g. in the hair of someone who has a fungal infection [After Robert Williams Wood (1868-1955), US physicist].
A unique luminary device employing ultraviolet light to identify specific categories of skin infections and infestations was introduced in 1903 by Robert Wood, a renowned physicist. This innovative lamp, commonly known as the Wood’s lamp, serves as a diagnostic tool that emits ultraviolet radiation to reveal distinct patterns and characteristics associated with certain skin conditions. Its invention has significantly contributed to the field of dermatology, enabling healthcare professionals to detect and diagnose skin ailments with enhanced precision.