Why placing a blue filter in front of a light source will give blue li

[hangover]

It may be a very simple question.
Why placing a blue filter in front of a light source will give blue light?Is this phenonmenon concerned with polarization of light(the vibration of electrons of the filter giving blue light)?
Thanks very much!

 

[TheDestroyer]

No it has for sure nothing to do with polarisation, but I would say (the only reason that makes sense) that it's because of the allowed electronic transitions in the material or the allowed vibrations modes.