Abstract
There are many biological effects of light, which pose a variety of problems and entail a variety of methods of approach; however, there are certain common principles involved in all. This discussion is confined largely to the effects of sunlight on the skin. Wave-length Variable Apart from certain rare diseases (in which other parts of the spectrum are concerned) and experimental use of extraneous photosensitizers, the principal effects of sunlight on human skin are produced by wave lengths shorter than about 0.32 μ (0.32 μ = 320 mμ = 3,200 A). There are certain important diseases of the skin in domestic animals that are produced by other wave lengths, but, for physiological or dietary reasons, these do not have their counterpart in human skin. 1 Wave lengths shorter than 0.32 μ, which comprise only a tiny fraction of sunlight (i. e. 0.01%), produce the various responses of sunburn, antirachitic action, and cutaneous
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
