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## Homework Statement

https://session.masteringphysics.com/problemAsset/1383558/3/21.EX26.jpg

Make a table with rows labeled P, Q, and R and columns labeled r1, r2, Δr, and C/D. Fill in the table for points P, Q, and R, giving the distances as multiples of λ and indicating, with a C or a D, whether the interference at that point is constructive or destructive.

## The Attempt at a Solution

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Okay, so I am not entirely sure I am doing this right. I have two attempts and used one. Can someone help me with this?

Here's my new answer

R1 R2 Δr C/D

P 2λ 3λ λ C

Q 3λ 2λ λ D

R 2.5 3λ 0.5λ C

Would you say this is correct?

Sorry, the graph is out of place. idk how to forumat