How is the following classical optics phenomenon explained in quantum electrodynamics?

• Reflection and Refraction

Are they simply due to photons being absorbed and re-emitted? How do we get to Snell's law, for example, in that case?

Split by request: See the other part of this question here.

How is the following classical optics phenomenon explained in quantum electrodynamics?

• Reflection and Refraction

Are they simply due to photons being absorbed and re-emitted? How do we get to Snell's law, for example, in that case?

Split by request: See the other part of this question here.

How are the following classical optics phenomena explained in quantum electrodynamics?

• Reflection and Refraction

Are they simply due to photons being absorbed and re-emitted? How do we get to Snell's law, for example, in that case?

• Color

According to Schroedinger's model of the atom, only particular colors are emitted depending on the type of atom and the state of its electrons. Then, how it is possible that the same type of matter changes color in relation to temperature? For example, water is transparent with a light blue tint, but snow is white (which means, pretty much, that photons have no particular color in the visible spectrum).

How is the following classical optics phenomenon explained in quantum electrodynamics?

• Reflection and Refraction

Are they simply due to photons being absorbed and re-emitted? How do we get to Snell's law, for example, in that case?

Split by request: See the other part of this question here.