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Introductory Physics Homework Help
Light reflected from film, find maximum thickness of film, draw phase diagram.
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[QUOTE="D.B0004, post: 3148385, member: 310553"] [h2]Homework Statement [/h2] The light reflected from a soap bubble (n=1.4) appears bright red (wave length= 640 nm) at its center. What is the minimum thickness (in nm) there? Dray Phase Diagram. [h2]Homework Equations[/h2] lambda(n)=lambda/n n=index of refraction 2*n*t=m*lambda OR 2*n*t =(m+.5)*lambda OR 2*n*t=m*lambda I don't know which one to use. [h2]The Attempt at a Solution[/h2] I tried skipping the first equation, because we know the light is INSIDE already, we should have the lambda(n) needed for the second three equations. I plugged numbers into both and got answers. 230 nm is what I believe the answer is. I understand that each of these are for different situations of constructive vs. destructive interference, but I do not understand how to tell which situation is happening in this question! I do not know when to change m either! Thanks so much for the help. [/QUOTE]
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Introductory Physics Homework Help
Light reflected from film, find maximum thickness of film, draw phase diagram.
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