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In thin film interference, what causes a phase change of π?
In thin film interference, what causes a phase change of π?
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Practice Questions
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Q1
In thin film interference, what causes a phase change of π?
Reflection from a denser medium
Reflection from a rarer medium
Transmission through a denser medium
Transmission through a rarer medium
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A phase change of π occurs when a wave reflects off a denser medium.
Questions & Step-by-step Solutions
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Q
Q: In thin film interference, what causes a phase change of π?
Solution:
A phase change of π occurs when a wave reflects off a denser medium.
Steps: 6
Show Steps
Step 1: Understand that light behaves like a wave.
Step 2: Know that when light hits a surface, some of it reflects back.
Step 3: Identify that there are different materials, some are denser than others (like air to glass).
Step 4: Recognize that when light reflects off a denser medium, it undergoes a phase change.
Step 5: A phase change of π means the wave is flipped upside down.
Step 6: Conclude that this phase change happens specifically when reflecting off a denser medium.
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