When a Beam of Light, Which Is Traveling in Air

question 37

Multiple Choice

When a beam of light, which is traveling in air, is reflected by a glass surface, there is

• A) a 90° phase change in the reflected beam.
• B) no phase change in the reflected beam.
• C) a 180° phase change in the reflected beam.
• D) a 60° phase change in the reflected beam.
• E) a 45° phase change in the reflected beam.

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Definitions:

Neurocognitive Disorder

A decline in mental function due to a medical condition or disease affecting the brain.

Age 85

A descriptor of individuals who have reached the age of eighty-five years; often associated with discussions on aging, health, and senior care.

Non-hispanic White

Refers to individuals in the United States who identify as White without Hispanic or Latino origins.

African Americans

An ethnic or racial group in the U.S. whose ancestors predominantly originated from sub-Saharan Africa.