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Thin Film Interference
Yasmin_5459
#1 Posted : Thursday, June 11, 2020 8:29:12 PM
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Hello,

I am a little confused on the overall concept of thin film interference. I know it is low yield but the CC companion goes into details relating to the thickness of the film that I am having trouble understanding.

Thank you
INSTR_Charanpreet_99
#2 Posted : Saturday, June 13, 2020 5:24:28 PM
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Hello,

When light reaches a boundary between two media, some of the light will pass through the boundary while some portion of it will reflect. If the boundary is a thin film (e.g. thin layer of oil sitting on top of a water puddle), it is possible that the light waves that passed through (i.e. transmitted into the new medium) and the light waves that reflected could be in-phase and add up, this is known as constructive interference. Where the film is particularly thin, it is possible that the transmitted and reflected light waves are out-of-phase, and this would result in destructive interference. If you have any further questions, please email the instructor and somebody will get back to you.
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