title: What is light?
authors.affiliation: Regional Medical Physics Department, Newcastle General Hospital, Newcastle upon Tyne, UK. b.l.diffey@ncl.ac.uk
authors.forename: Brian L
authors.initials: BL
authors.lastname: Diffey
mesh_terms: D006801:Humans; D055095:Optics and Photonics; D055585:Physical Phenomena; D010825:Physics; D012867:Skin / Q000528:radiation effects*; D013472:Sunlight / Q000009:adverse effects; D014466:Ultraviolet Rays / Q000009:adverse effects