The indoor electric lap which was invented during the second industrial revolution (which you've mentioned) enabled people to be awake much longer at a good light source, they were able to read, to communicate or to do anything they desired. This of course had a dramatic affect how people were socializing at night :)
The primary effect of cultural exchange between Europe and the Islamic world was that Muslim goods and knowledge led to some advancements in European society. One advancement example is the number system.
Hi. I hope you enjoyed your stay in Iran. If you like, I can give you more information about Tabriz and Iran
The character that left was the maid, Mercy. She left because the grandmother decided to sit next to the daughter and this meant that she was not needed anymore. This scene is important because it foreshadows and implies many things from the future of the story which are related to the idea that they are all faking it.
