Monochromatic light and reflection

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  • #2
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Perhaps just a geometric problem?
 

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  • #3
61
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so perhaps the index of refraction does not matter?
 
  • #4
14
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From that question, I wouldn't say so .. I assumed it continued to asking something else later on, more relevant to the refractive index?
 
  • #5
61
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lol no. This was a practice exam and half the people got it wrong. I guess the teacher was just being tricky.
 
  • #6
14
0
Very sneaky!

Well, from how it reads, I'd say that's the right answer
 
  • #7
ehild
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Think of phase change at both boundaries: air-alcohol and alcohol-plastic. What is the phase difference between the wave reflected from the alcohol-plastic interface and the directly reflected one (from the air-alcohol interface)?

ehild
 

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