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Phase Changes, Interference types, and thickness equations of films and coats during Thin Film/Coat Interference for AP Physics 2
Constructive Interference for a Film (Equation)
2t = (m + 0.5)λ
Destructive Interference for a Coat (equation)
2t = (m + 0.5)λ
Constructive Interference for a Coat (equation)
2t = mλ
Destructive Interference for a Film (equation)
2t = mλ
Indices of Refraction for a Film
n1 < n2 > n3
Indices of Refraction for a Coat
n1 < n2 < n3
Phase Change of Reflected Ray
180 degrees
Phase Change of Refracted Ray (Coat)
180 degrees
Phase Change of Refracted Ray (Film)
0 degrees
Note 
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