Two Thin Layers of Material with Different Indices of Refraction

question 31

Multiple Choice

Two thin layers of material with different indices of refraction are coated on a glass plate.The outer first material has n₁ = 1.404,the inner second material has n₂ = 1.176,and the glass has n_glass = 1.62.If light is incident from air on the first layer,what is the phase change relative to that of the first layer reflection for light that reflects from the glass?

• A) 180°
• B) 540°
• C) 360°
• D) 0°

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