In a thin film interference, if the film is denser than the medium it is placed

In a thin film interference, if the film is denser than the medium it is placed in, what happens to the phase of the reflected wave?

In a thin film interference, if the film is denser than the medium it is placed in, what happens to the phase of the reflected wave?

Step 1: Understand that thin film interference involves light waves reflecting off surfaces.
Step 2: Identify the two media involved: the thin film and the medium it is placed in.
Step 3: Determine the density of the thin film compared to the medium. In this case, the film is denser.
Step 4: Recall the rule for reflection: when light reflects off a denser medium, it experiences a phase change.
Step 5: Conclude that the phase change is π (180 degrees) when light reflects off the denser film.

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