A thin film of polystyrene is used as an antireflective coating for fabulite (known as the substrate). The index of refraction of the polystyrene is 1.49, and the index of refraction of the fabulite is 2.409. (Figure 1)
Part A
What is the minimum thickness of film required? Assume that the wavelength of the light in air is 470 nanometers.
Express your answer in nanometers.
The thickness of the film required is,
$$ \begin{aligned} d &=\frac{\lambda}{4 n} \\ &=\frac{470 \mathrm{~nm}}{4(1.49)} \\ &=\frac{470 \mathrm{~nm}}{5.96} \\ &=78.85 \mathrm{~nm} \end{aligned} $$
A thin film of polystyrene is used as an antireflective coating for fabulite (known as the...
A thin film of polystyrene is used as an anti-reflective coating for fabulite (known as the substrate). The index of refraction of the polystyrene is 1.49, and the index of refraction of the fabulite is 2.409. What is the least coating thickness that eliminates the reflections at the middle of the visible spectrum ( = 550nm)? Assume that the light is approximately perpendicular to the film surface.
A thin film of polystyrene of refractive index 1.49 is used as a nonreflecting coating for Fabulite (strontium titanate) of refractive index 2.409. What is the minimum thickness of the film required? Assume that the wavelength of the light in air is 550nm .
Chapter 24: Antireflective Coating What is the minimum thickness of m Express your answer in nanometers. tabulte (known as the substrate). The index of View Available Hints) Figure Air rays Polystyrene1.49 n2409 Fabulite Constants Express your answer in meters has a d/15. The lasers prockuce 20, Interference patterns on a screen View Available Hint(s) e 5.60 m 0.0767m Previous Answers Part C What is the distance Express your answer in meters. View Available Hin (s) Chapter 24: Antireflective Coating What...
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