Yellow Light Is Viewed by Reflection from a Thin Vertical $\lambda$

question 47

Multiple Choice

Yellow light is viewed by reflection from a thin vertical soap film.Let $\lambda$ be the wavelength of the light within the film.Why is there a large dark space at the top of the film?

• A)no light is transmitted through this part of the film
• B)the film thickness there is \(\lambda\)/4
• C)the light reflected from exactly one of the two surfaces undergoes a 180\(\lambda\) phase change
• D)the film is too thick in this region for thin film formulas to apply
• E)the reflected light is in the infrared

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Definitions:

Heart Failure

A chronic condition in which the heart is unable to pump blood effectively to meet the body's needs.

Active Motion

Movement initiated and performed by an individual without assistance, reflecting the range of motion and strength of muscles and joints.

Slight Weakness

A minor or mild loss of strength in one or more muscles, not typically indicative of a serious condition.

ROM

Range of Motion; the full movement potential of a joint, usually its range of flexion and extension.