# Talk:Propagation, Reflection and Refraction

From CleanEnergyWIKI

Vectors- there seems to be some confusion about using vectors with lambda please help sort this out.

One thing I noticed going through the basics of light is that wavelength is defined as a vectorial quantity. This is wrong it is a scalar. Wave vector is a vector and its magnitude (a scalar) relates to the wavelength as indicated. It is just plain math basics and is wrong, vectors can not be divided, only their moduli can. Jean-Luc would be horrified by this himself and probably does not remember writing this.

Bernard Kippelin 9/29

There is a need for vectors on "c" and on all "lambdas"

Also, all "n" and "v" should be replaced with the greek letter "nu"

Jean Luc 10/3