What is the thinnest film for which this can occur

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A thin film of MgF2 (n = 1.38) coats a piece of glass (n = 1.50). Constructive interference is observed for the reflection of light with wavelength (in air) of 400 nm. What is the thinnest film for which this can occur?

Group of answer choices

  • 133 nm
  • 181 nm
  • 145 nm
  • 290 nm
  • 400 nm

Reference no: EM132512688

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