Understanding the Phases in the Double-Slit Experiment

AI Thread Summary
The discussion focuses on a student's misunderstanding of the double-slit experiment in a graded homework assignment. Key issues identified include the failure to use phasors as required, arriving at an impossible answer of 3 E0, and a lack of comprehension of fundamental concepts related to wave interference. The student is advised to first address why waves from the two slits reach the screen at different phases. Overall, the conversation highlights the importance of grasping basic principles in physics to solve related problems effectively.
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1. Homework Statement and all the rest
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This is from a take home exam we already had graded. Professor does not mark our papers or review and we have no tutors. :(

Can someone point where I went wrong? The blues are the few markings he made that I went over again and the orange just seperates.
 
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Sorry, but it's not so much a matter of where you went wrong; you never even got started. First, you didn't do the problem the way you were ask to, using phasors. Second, the answer you got, 3 E0, is physically impossible, and you should have recognized this. Finally, it's pretty clear you don't understand the basic concepts behind the double-slit experiment.

Start by answering the question: Why do the waves from the two slits arrive at a point on the screen with different phases?
 

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