horizontal vs vertical polarization

Is it possible that the vertical polarization can turn to vertical polarization due to reflections? Why?

yes true. vertical pol. can change after reflection to horizantal pol. Think about reflector as a mirror. than you ll understand why the pol. changes. images on the mirror seems inverted.

I think due to theory of reflection , difraction and scattering of waves it may possible.

Regards,
Isuranja