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°

---

Definitions:

Savings

Money that is set aside or stored for future use or emergencies, rather than spent immediately.

Invested

The act of allocating money or capital to an endeavor with the expectation of obtaining an additional income or profit.

Annuity

An annuity is a financial product that pays out a fixed stream of payments to an individual, typically used as an income stream for retirees.

Payments

Transactions made by individuals or entities to fulfill obligations or purchase goods and services.