What is a Waveplate?

While not actually a polarizing element, waveplates affect the polarization of light by using a birefringent material to differentially delay waves with their polarization oriented in two orthogonal directions called the slow axis and fast axis. Among their capabilities are that a 1/4 wave waveplate can be used to convert linear to circular polarized light and vice-versa and a Half Wave Plate (HWP) can be used to rotate a linearly polarized beam by an arbitrary angle. Waveplates must be designed for a specific wavelength.

They may be classified as zeroth-order or multiple-order. A multiple-order waveplate has a total slow-axis retardation of some(unspecified) number of integers plus 1/4 or 1/2. A zeroth-order (or 0th-order) waveplate has a total retardation of exactly the specified phase (e.g., 1/2 wave).

But such a waveplate would have to be extremely thin and fragile. So, most commercial zeroth-order waveplates are made by combining two multiple order plates of very slightly ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.