Dr . V. DavydovHabtetsion, Semereab2022-02-092023-11-092022-02-092023-11-091983-06http://10.90.10.223:4000/handle/123456789/29984The necessary background material for t h e a na lys is of the electon phonon in te r ac t i on v it h respect t o the abs o r pt i on c o ef fi c i e n t a nd c ha nge i n in c i de nt p ho non f r e qu e ncy is d is c us s ed i n the fir st and s ec o nd chapte r s o f t hi s thesisenThesis