I'm doing A-level OCR physic exam and i'm very confused on what is the difference between "first bright fringe","first dark fringe" "2nd bright fringe" "Maxima", "Minima", "Maximum", "Minimum", "Destructive interference", "Constructive interference". I always think that: First bright fringe = Maxima = Maximum = Constructive interference. and First Dark fringe = Minima = Minimum = Destructive interference. Is this right? And in the exam which one should i talk about because every time the answer is different. Also what is Resonance? # And what is energy levels? Please my exam is soon, so please try to be quick, Thanks in advance.