Two questions for the book-readers (spoilers)
1. First question is related to the Goblet of Fire scene when Voldermort and Harry sort of link with their wands and Harry's parents appear along with Sedric.
What I want to ask you is was Voldermort able to see those basically ghosts? In the movie it looks like he could because he was looking around at them as they were appearing.
So if the answer is yes, he could see them, my questions is was Voldermort after that kind of intimidated by harry's abilities? I mean he basically stopped AGAIN the Avada Kadavra killing curse because of the same wand cores, and then when they connected he spawned ghosts of his parents and Sedric. After harry "let go" the wand link, those ghost flew at Voldemort and blinded him in order to buy some time to harry so he can teleport away. What I am trying to say is was Voldemort after that thinking higher of Harry and his powers/abilities? In the movie nothing of this is indicated.
2. The second questions is how do wizards write spells? We heard that in Goblet of Fire Dumbledor wrote himself the "Age Line" spell so no one under age of 18 can enroll in the tournament. In Half blood Prince we hear from Snape that and I quote "You would try to use my own spells against me?" So how are spells actually written? I understand with potions, you just mix some stuff, but with spells its different. Is that explained in the books?
I was imagining something like that you write it basically by thinking of it in your head and you have to teach your wand, practice and then while invoking the spell i guess you need to think of that? I dont know, im just using the logic that applied to the Patronus charm where Harry basically had to think of a happy strong memory while invoking the spell.