Hold one lens in front of the other so they are parallel. Look through them and slowly rotate the lenses between 0 and 90 degrees. If they are polarized, you will notice a darkening effect as you rotate them.
Hold one lens in front of the other so they are parallel. Look through them and slowly rotate the lenses between 0 and 90 degrees. If they are polarized, you will notice a darkening effect as you rotate them.
