光学こうがくkougaku光こう学がく光こう学がくShow answer(Space)Suspend(@)光こう学がく光こう学がくkougakuCommonRelative commonness of this word, based on various sources (incl. newspapers)CommonNoun (common)Noun (common) (futsuumeishi)Noun (common)の-adj.Nouns which may take the genitive case particle 'no'の-adj.optics光こう学がく光こう学がくkougakuopticsWhat does 光学 mean in English?optics(n, adj-no)Search the picture dictionary for 光学