Ace your laser hair removal certification with our comprehensive practice exam. Featuring multiple-choice questions, detailed explanations, and hints, get the preparation you need to ensure success.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What percentage of UV radiation that reaches the Earth is composed of UVA rays?

  1. 75%

  2. 85%

  3. 95%

  4. 100%

The correct answer is: 95%

UVA rays make up about 95% of the UV radiation that reaches the Earth's surface. This is because UVA rays have longer wavelengths than UVB and UVC rays, allowing them to penetrate deeper into the skin. Therefore, options A, B, and D are incorrect as they do not accurately represent the high percentage of UVA rays in the UV radiation that reaches the Earth.