Milady Esthetics State Board Practice Test 2026 - Free Esthetics Exam Practice Questions and Study Guide

Question: 1 / 400

Invisible rays constitute approximately what percentage of natural sunlight?

50%

65%

Invisible rays, also known as ultraviolet (UV) rays, represent a significant portion of the sunlight that reaches the Earth. Approximately 65% of natural sunlight falls into the category of invisible rays. This includes both UV rays and infrared radiation, which are not visible to the naked eye but have important implications for skin health and esthetics.

Understanding this percentage is critical for estheticians as it highlights the importance of protecting the skin from harmful UV exposure, which can lead to premature aging and skin cancer. Sun protection protocols, including the use of sunscreen and protective clothing, are essential aspects of skin care practices. Therefore, knowing that a substantial majority of sunlight is invisible emphasizes the need for proper education and protective measures in esthetic procedures.

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75%

85%

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