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MMLU / Blue light of wavelength 480 nanometers is most strongly reflected off a thin…

Problem

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question

Blue light of wavelength 480 nanometers is most strongly reflected off a thin film of oil on a glass slide when viewed near normal incidence. Assuming that the index of refraction of the oil is 1.2 and that of the glass is 1.6, what is the minimum thickness of the oil film (other than zero) ?

choices

  1. 150 nm
  2. 200 nm
  3. 300 nm
  4. 400 nm

subject

college_physics

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