The audience would experience feelings of dread in Act 5 Scene 3, where Romeo is going to kill himself at Juliet's tomb. The costumes would tell us what time of the day it is, in this case night time.
Where in the balcony scene Romeo saw Juliet as transforming the night into day, here she is able to transform the day into the night. The outrage by Capulet, her father increases the tension and highlights the disintegration of their relationship. Juliet declares that the light outside comes not from the sun, but from some meteor.
Lady Capulet calls to her daughter. This is a ply which also shows how prejudice leads to escalating violence. Shakespeare's main themes throughout the play are of love, conflict and of youth versus age It is in this scene that the son of the Montague family, Romeo and the daughter of the Capulet family, Juliet, meet and fall in love and the tragedy of the play takes form.
Juliet is appalled. There are many other things Juliet says that have a double-meaning.