Dentists employ light-cured materials to fill cavities.The wavelength of electromagnetic radiation used to photopolymerize restorative materials falls in the ultraviolet or visible region,depending on the instrument employed.Which of these wavelengths is in the UV region?

Question

Quizplus · Accepted Answer

Ultraviolet (UV) light falls in the range of 10-400 nm, and 300 nm falls within that range. Therefore, option B is the correct answer. Option A is too low a wavelength (31 nm) and falls in the X-ray region, while options C (440 nm) and D (840 nm) fall within the visible and infrared region, respectively.

Dentists Employ Light-Cured Materials to Fill Cavities