lecture32 - thin films

# lecture32 - thin films - What you will be able to do a/er...

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What you will be able to do a/er today … the interference pa6ern from light reﬂec:ng oF of a thin ±lm what the condi:ons for construc:ve and destruc:ve interference are what happens to the phase for a transmi6ed & reﬂected wave Explain … the refrac:ve index the ±lm thickness the phase shi/ Calculate … knowledge of interference from sound to light what happens to wavelength inside a medium Apply …

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Monday Tuesday Wednesday Thursday Friday 10 – 11 AM office hours HENN 405 11AM – 12PM TA help HEBB 32 12 – 1 PM PhysSoc *FREE* tutoring PhysSoc * FREE* tutoring sesssion HEBB 32 1 – 2 PM PhysSoc Hennings 307 Hennings 307 PhysSoc Hennings 307 Hennings 307 PhysSoc * FREE* tutoring 2 – 3 PM PHYS 101 section 102 PHYS 101 section 102 PHYS 101 section 102 3 – 4 PM (extend 6PM) office hours HENN 405 4 – 5 PM sesssion HEBB 13 Javed’s problem- solving HENN 201 sesssion HEBB 13 sesssion HEBB 13 PHYSICS 101 help sessions & oﬃce hours & PhysSoc *FREE* tutoring
transmitted & reflected waves NO phase change to transmitted pulse reflected pulse inverted, i.e., phase shift of π NO phase change to transmitted pulse NO phase change to reflected pulse analogous to different n-values

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medium 1 n 1 medium 2 n 2 incident ray reflected ray transmitted ray boundary Reflection and Transmission of light at the boundary of two media NOTE that we are drawing the light waves at an angle nearly normal to the surface. Otherwise the path length would not be simply 2t (the distance traveled into the film and back out of the film
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lecture32 - thin films - What you will be able to do a/er...

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