"Is it permissible for a husband to look at his wife after her death? "

It is permissible for one of the spouses to look at the other after their death, and to wash and shroud them. This is the opinion of the majority of scholars. Evidence for this is found in the hadith of Aisha, may Allah be pleased with her, with the Prophet, peace be upon him, when he told her that he would wash and shroud her if she died before him. Also, evidence is from the fact that Ali washed Fatima and Asma bint Umais washed Abu Bakr, may Allah be pleased with them all, and none of the companions objected to this, so it was a consensus.