select the best answer. be sure to read all choices before making a selection. why was radium used to paint…

select the best answer. be sure to read all choices before making a selection. why was radium used to paint watch dials? a it provided high contrast. b it lubricated the dial. c it protected the gears. d it provided a luminous glow.

select the best answer. be sure to read all choices before making a selection. why was radium used to paint watch dials? a it provided high contrast. b it lubricated the dial. c it protected the gears. d it provided a luminous glow.

Answer

Brief Explanations:

El radio es un elemento radiactivo que emite luz en la oscuridad. Fue usado en los relojes para que los usuarios pudieran leer la hora en la oscuridad.

Answer:

D. It provided a luminous glow.