The description of the light cantrip says:
You touch one object that is no larger than 10 feet in any dimension. Until the spell ends, the object sheds bright light in a 20-foot radius and dim light for an additional 20 feet. The light can be colored as you like. Completely covering the object with something opaque blocks the light. The spell ends if you cast it again or dismiss it as an action.
What happens when that object is broken into two or more pieces? Do the pieces carry part (or the whole) of the intensity of the 20/20 light? And if each PC gets one piece, wouldn't that effectively create many light sources at the cost of one cantrip (1 action)?
What if the object is destroyed (e.g. piece of paper that's burned)? Would that effectively terminate the spell?