## Physics: Principles with Applications (7th Edition)

Published by Pearson

# Chapter 24 - The Wave Nature of Light - Questions: 4

#### Answer

For destructive interference, the path lengths differ by an odd number of half wavelengths: $\frac{\lambda}{2}$, $\frac{3 \lambda}{2}$, $\frac{5 \lambda}{2}$, etc.

#### Work Step by Step

In these cases, wave crests from one wave interfere with wave troughs from the other wave, causing destructive interference.

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