Which Statement About Ultraviolet Radiation Is True

question 26

Multiple Choice

Which statement about ultraviolet radiation is true?

• A)It's best to avoid outdoor activity in the late afternoon,because the sun's rays are most intense after 3 P.M.
• B)Swimming is a good choice of outdoor activity,because ultraviolet rays cannot penetrate water.
• C)Sand reflects ultraviolet radiation,so beach-goers need to wear sunscreen even if they sit under a beach umbrella.
• D)Sunscreen is not needed at high elevations because the atmosphere at high altitude filters out most ultraviolet radiation.

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Definitions:

Perceptual Constancy

The ability of the perceptual system to recognize objects as having constant properties (size, shape, color) even when sensory input varies.

Retinal Images

The projections of visual stimuli on the retina, the light-sensitive layer at the back of the eye, which are then processed by the brain to create visual perception.

Gestalt Principles

Theories in psychology that propose humans naturally perceive objects as organized patterns and wholes, rather than their separate components.

Simplicity

The quality or condition of being easy to understand or do, often characterized by clarity, purity, or uncomplicatedness.