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Homework Statement
Light of wavelength [tex]\lambda[/tex] strikes a pane of glass of thickness T and refractice index n, as shown in figure(I attached a diagram I made). Part of the beam is reflected off the upper surface of the glass, and part is transmitted and then reflected off the lower surface of the glass. Destructive interference between these two beams will occur if :
a) T = [tex]\lambda[/tex] / 2
b) 2T = [tex]\lambda[/tex] / 2
c) T = [tex]\lambda[/tex] / 2n
d) 2T = [tex]\lambda[/tex] / 2n
Homework Equations
2T= m[tex]\lambda[/tex]
The Attempt at a Solution
According to this equation, destructive interference occurs when 2T = [tex]\lambda[/tex] /2. Right? Since [tex]\lambda[/tex] = [tex]\lambda[/tex] [tex]_{0}[/tex] / n, then 2T= [tex]\lambda[/tex] / 2n right? The correct answer is C though. I got answer D. What am i doing wrong. Thanks
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