APFIVE Phase Change Upon Reflection
Light traveling in air (n = 1.00) is incident on a thin film of oil (n = 1.47) floating on water (n = 1.33). Which statement correctly describes the phase change of the light upon reflection at the air-oil interface?
A
The phase change depends on the angle of incidence
B
A 90° phase change occurs at this interface
C
No phase change occurs at this interface
D
A 180° phase change occurs at this interface
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