Monochromatic Light (λ = 500 Nm) Is Incident on a Soap

question 36

Multiple Choice

Monochromatic light (λ = 500 nm) is incident on a soap bubble (n = 1.4) that is 500-nm thick. Calculate the change of phase of the light that penetrates the front surface, reflects from the second surface, and emerges through the first surface as an angle between 0° and 360°?

• A) 280°
• B) 160°
• C) 220°
• D) 100°
• E) 290°

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Definitions:

REM Sleep

Rapid Eye Movement sleep, a sleep stage characterized by eye movements, increased brain activity, and vivid dreams.

Alpha Waves

The brain wave pattern associated with deep relaxation.

Delta Waves

Slow brain waves that are present in deep sleep and in brain activities associated with unconsciousness.

EEG

Electroencephalography, a noninvasive method to record electrical activity of the brain used in the diagnosis of neurological disorders, sleep disorders, and for research in neuroscience.