The atom in an excited state has more energy and is less stable than the atom in the ground state.
Your answer would be B, Reflected light! hope this helps
Homogeneous - the mixture is even throughout the solution cannot tell one part from another
heterogenous - the mixture is not mixed even and you can tell one compound from another.
NaCl is a homogeneous solution since you cannot visibly separate the NaCl from the water it is dissolved in.
