LAB 8 PRE-LAB The pre-lab Is due when you walk through the door into lab, before
ID: 2031007 • Letter: L
Question
LAB 8 PRE-LAB The pre-lab Is due when you walk through the door into lab, before the TA has started the lab session. Your score on the pre-lab is added to your score on the lab exercise. 1. (2 pts.) What is ray-tracing and why is it used to analyze optical systems? 2. (2 pts.) What is the difference between a real and a virtual image? 3. (4 pts.) Besides the equation used to calculate them, how is "percent difference" different from "percent error"? What does the percent difference tell you about two values? 4. (2 pts.) What are the principal rays and why are they used in analyzing optical systems?Explanation / Answer
1)
Ray tracing is the primary method used by optical engineers to determine optical system performance. Ray tracing is the act of manually tracing a ray of light through a system by calculating the angle of refraction/reflection at each surface.
This method is used in optical systems as it is extremely useful in systems with many surfaces, where Gaussian and Newtonian imaging equations are unsuitable given the degree of complexity.
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