Why Isn't My Solar Cell Interference Filter Calculation Matching the Assignment?

In summary, the conversation is about a homework assignment involving trigonometry and Snell's law. The person has found a solution using ordinary trigonometry but it does not match the expected answer. They suspect a mistake may have been made by the TA who created the exercise.
  • #1
Wminus
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Homework Statement


See attached image, assignment a)

Homework Equations

The Attempt at a Solution


Using ordinary trigonometry, I got simply $$\Delta = sin(\theta_i) 2 d tan(\theta_t) n_{air} - 2n_{oxide} d/cos(\theta_t)$$. However, even if I apply Snell's law, it's not the answer I'm supposed to get according to the assignment. So what's happening?

The two lower triangles with the angle ##\theta_t## are identical, right?
 

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  • #2
I agree with your answer.
 
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Likes Wminus
  • #3
mfb said:
I agree with your answer.
OK I'll send the professor an email. might be that the TA who made this exercise did a mistake
 

FAQ: Why Isn't My Solar Cell Interference Filter Calculation Matching the Assignment?

1. What is a solar cell interference filter?

A solar cell interference filter is a thin film coating that is applied to solar cells to selectively filter out certain wavelengths of light. This allows only the desired wavelengths to be absorbed by the solar cells, increasing their efficiency.

2. How does a solar cell interference filter work?

A solar cell interference filter works by using the principle of interference, where light waves that are in phase with each other reinforce each other, while waves that are out of phase cancel each other out. The filter is designed to reflect or transmit specific wavelengths of light, depending on the desired function.

3. What materials are used to make solar cell interference filters?

Solar cell interference filters are typically made from thin films of materials such as silicon, titanium dioxide, and zinc oxide. These materials are chosen for their ability to selectively reflect or transmit certain wavelengths of light.

4. What are the benefits of using a solar cell interference filter?

The main benefit of using a solar cell interference filter is increased efficiency of the solar cell. By filtering out unwanted wavelengths, more of the desired light can be absorbed by the solar cell, leading to higher energy production. Additionally, interference filters can help reduce glare and improve the overall appearance of solar panels.

5. Are there any limitations or challenges associated with using solar cell interference filters?

One limitation of using solar cell interference filters is that they are only effective for specific wavelengths of light. This means that the filter must be designed for the specific type of solar cell and the spectrum of light that it is expected to receive. Additionally, interference filters can be expensive to produce and may add to the overall cost of solar panel production.

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