Tin (II) chloride is white while tin(II) iodide is red. Why?
The answer given in my book says:
Bigger anion has higher polarizability; more polarization greater is the intensity of colour(valence shell electrons are loosely bound to the nucleus).
This answer doesn't seem to be very explanatory. Even google doesn't offer anything. It would be great if someone could explain it in a better way, focussing on the following two points:
Firstly, how does more polarization lead to greater intensity of colour?
Secondly, how is intensity anyways related to frequency of radiation?