Source: https://tribu.phm.education.gouv.fr/toutatice-portail-cms-nuxeo/binary/TP20+-+R%C3%A9fraction+de+la+lumi%C3%A8re.docx?type=FILE&path=%2Fdefault-domain%2Fworkspaces%2Fespace-collaboratif-spc-lycee-jaufre-rudel%2Fseconde%2F2020-2021%2Ftp%2Ftp-n-25-lois-de-snell%2Ftp20-refraction-de-la&portalName=foad&liveState=true&fieldName=file:content&t=1631124683.pdf