Light ray A, travelling in vacuum, is incident on a thin liquid that is used to coat a glass surface. Reflected rays B, C, and D are also shown on the diagram. The refractive index of glass is larger than the refractive index of the liquid coating. SQ-T9.3-P1-Q3 A B D. vacuum liquid glass Which of the following statements is true about the phase change of the three reflected rays? A. All three rays undergo a phase change of 180°. B. Only ray B undergoes a phase change of 180°. C. Only rays B and C undergo a phase change of 180°. D. Only rays C and D undergo a phase change of 180°.

Light ray A, travelling in vacuum, is incident on a thin liquid that is used to coat a glass surface. Reflected rays B, C, and D are also shown on the diagram. The refractive index of glass is larger than the refractive index of the liquid coating. SQ-T9.3-P1-Q3 A B D. vacuum liquid glass Which of the following statements is true about the phase change of the three reflected rays? A. All three rays undergo a phase change of 180°. B. Only ray B undergoes a phase change of 180°. C. Only rays B and C undergo a phase change of 180°. D. Only rays C and D undergo a phase change of 180°.