Study on light interference, phase and time coherence in optics, geometrical optics laws, photometry, and the principles of Huygens and Fresnel in determining the coherence of wavefronts Yorug’lik interferensiyasi. Fazo va vaqt bo’yicha kogerentlik  Interferometrlar   Optika predmeti Yorug’lik xossalari. Geometrik optika qonunlari  Fotometriya