Wave length of UV A2 rays is: (A) 200nm to 280nm, (B) 280nm to 320nm, (C) 320nm to 340nm, (D) 340nm to 400nm
Answer is C. Ultraviolet light * Ultraviolet light (UV) is made up of: # Vacuum UVC (10-200 nm) # UVC (200-280 nm) # UVB (280-320 nm) # UVA (320-400 nm) divided into UVAII (320-340 nm) and UVAI (340-400 nm). Ref:- Review of Dermatology by Alikhan; pg num:-13