In manage, the wavelength of ultraviolet light is___________
A. 2500 to 3000a°
B. 3500 to 4000a°
C. 4500 to 5000a°
D. none of the above
Answer:B
In manage, the wavelength of ultraviolet light is___________
A. 2500 to 3000a° B. 3500 to 4000a° C. 4500 to 5000a° D. none of the above