The transmissivity, T, of a transparent material 20 mm thick to normally incident light is 0.88. If the index of refraction of this material is 1.6, compute the thickness of material that will yield a transmissivity of 0.73. All reflection losses should be considered. The first step in calculating the thickness for this problem is to calculate the reflectivity. What is R, the reflectivity? R What is 3, the absorption coefficient, in mm ¹? B= i mm-1
The transmissivity, T, of a transparent material 20 mm thick to normally incident light is 0.88. If the index of refraction of this material is 1.6, compute the thickness of material that will yield a transmissivity of 0.73. All reflection losses should be considered. The first step in calculating the thickness for this problem is to calculate the reflectivity. What is R, the reflectivity? R What is 3, the absorption coefficient, in mm ¹? B= i mm-1
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Transcribed Image Text:The transmissivity, T, of a transparent material 20 mm thick to normally incident light is 0.88. If the index of refraction of this material
is 1.6, compute the thickness of material that will yield a transmissivity of 0.73. All reflection losses should be considered.
The first step in calculating the thickness for this problem is to calculate the reflectivity.
What is R, the reflectivity?
R=
What is 3, the absorption coefficient, in mm ¹?
B =
i
1 =
i
What is the required thickness, I, in mm?
mm-1
i
mm
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