HWGACOR FOR DUMMIES

" An experiment by using a h2o-filled glass sphere was executed and al-Farisi showed the additional refractions as a result of glass could possibly be ignored in his product.[74][c] As he noted in his Kitab Tanqih al-Manazir (The Revision of the Optics), al-Farisi made use of a considerable obvious vessel of glass in the shape of the sphere, which