Light of Wave Length $\lambda$ Is Incident on Two Thin Films That Are in Contact

question 105

Multiple Choice

Light of wave length $\lambda$ is incident on two thin films that are in contact and surrounded by air. The top layer is $\lambda$ /4 thick and has an index of refraction of 1.33. The bottom layer is $\lambda$ /2 thick and has an index of refraction of 1.50. At normal incidence, the reflected rays that are in phase with each other are

• A) 1 and 2
• B) 1 and 3
• C) 2 and 3
• D) 1, 2, and 3
• E) None of these is correct.

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Definitions:

Bowed Out

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Straight Line

A geometric concept representing the shortest distance between two points in a plane, characterized by constant direction and an infinite number of points.

Opportunity Cost

The expense incurred by not choosing the second-best option available when a decision is made.

Sweaters

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