Week 7 Thin Film & Fabriery-Perotetalon

Question 1

what is the optical path difference for a thin film equation

Answer 1

OPD = 2dcosθr = mλ

Question 2

what is actually true of the OPD for thin film

Answer 2

there is phase shift of π so is actually a dark fringe condition

Question 3

what is the general interference condition equation

Answer 3

2dcosθ = mλ

Question 4

what is the idea of the Fabriery-Peroetalon situation

Answer 4

light passes through a reflective black refracting slightly before being incident upon anther refractive block
Each reflection results in a slightly reduced intensity as some light is reflected and some is refracted