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joja [24]
3 years ago
10

What is the minimum coating thickness (but not zero) that will minimize the reflection at the wavelength of 705 nm where solar c

ells are most efficient?
Physics
1 answer:
DanielleElmas [232]3 years ago
4 0

Answer:

d = 235 nm.

Explanation:

Let the layer be of glass. Refractive index of glass μ = 1.5. Let the required  thickness be d.

For minimum reflection , that is destructive interference in thin films , the condition is

2μd = λ ( for first order)

d = 705 / 2 x 1.5 = 235 nm [ λ =705 nm ]

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