In this lesson, we will learn how to analyze the interference of light reflected from parallel layers of substances with different refractive indices.
Q1:
A light wave that travels in a medium with a refractive index 𝑛 is incident on and reflects from a medium with a refractive index 𝑛. By how many degrees does the phase of the light wave change when it reflects if 𝑛<𝑛?
Q2:
A light wave that travels in a medium with a refractive index 𝑛 is incident on and reflects from a medium with a refractive index 𝑛. By how many degrees does the phase of the light wave change when it reflects if 𝑛>𝑛?
Q3:
A window is coated with an antireflective film 116 nm thick that has a refractive index of 1.24. For what wavelength of light does the film produce destructive interference?
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