Rainbow with Polariser

On my trip to Bihar for the Eclipse I was carrying my self made polariser. The purpose had been to take pics of the corona's polarised light. Of course the rains having just given us a raw deal (but a lucky peek at the eclipse too), we could not take those pics. However, during the train trip  back, We saw his amazing double rainbow out of the window and I attempted some shots from the moving train. I experimented with the polariser too and here are the results.