Violation
Which of the following affect(s) polymerization of visible light cured composite resins? 1. Intensity of the light source. 2. Thickness of composite resin. 3. Proximity of light source. 4. Shade of composite resin.
(1) and (3)
All of the above.
(1) (2) (3)
(4) only
(2) and (4)