اعرب ما يلي. حين اكتشف العلماء قدرة ذبذبات الاثير

Scientists discovered the ability of ether vibrations. The word “حين” is a time adverb that is based on the past tense. “اكتشف” is a past tense verb. “العلماء” is the subject as it is in the nominative case. “قدرة” is the object that is accusative. “ذبذبات الاثير” is a genitive construction with “ذبذبات” being in the genitive case and “الاثير” being in the accusative case. The phrase “وحين” is in the genitive case, and the sentence “اكتشف العلماء قدرة ذبذبات الاثير” is in the genitive case as well.