May someone do this for me?

yes sure that is the right one

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.