Concept explainers
To Explain: The condition required for part of the light reflected from a surface to be canceled by another part that is reflected from a second surface.
Answer to Problem 10A
When maxima of two waves are out of phase of 180 degrees then destructive interference occurs.
Explanation of Solution
Introduction:
During the superimposing of two waves in destructive interference, the waves cancel each other out, creating a lower amplitude resultant wave.
A part of the light reflected from a surface is canceled by another part that is reflected from a second surface when the waves are out of the phase. It means that the crest and troughs of the waves are superimposed.
Conclusion:
Thus, destructive interference occurs when waves are out of phase.
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