When Light from a Flashlight Is Moved Quickly Back and Forth

question 4

Multiple Choice

When light from a flashlight is moved quickly back and forth on a wall in a darkened room, it can appear to observers that there is a trail of light moving across the wall, even though physically the light is only in one place at any given time. This experience is an effect of memory that occurs because of

• A) a visual delay effect.
• B) echoic memory.
• C) persistence of vision.
• D) top-down processing.

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Definitions:

Proper Body Mechanics

Techniques used to move one's body efficiently and safely, particularly during physical activities like lifting, bending, and walking, to prevent injury.

Chronic Obstructive Pulmonary Disease

A long-term, progressive lung disease that makes breathing difficult due to obstruction of airflow from the lungs, commonly caused by smoking.

Diastolic Blood Pressure

The blood pressure measured during the relaxation phase of the heart's pumping cycle.

Systolic Blood Pressure

The pressure in the arteries when the heart beats and fills them with blood, typically the higher of the two numbers recorded when measuring blood pressure.