| 1. | Hats, gloves and umbrellas that block ultraviolet rays _ they're all there.
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| 2. | Sunblock : A product that works by physically blocking the ultraviolet rays.
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| 3. | With proper protection from ultraviolet rays, XP sufferers can live to adulthood.
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| 4. | The ozone layer protects people from the sun's most damaging ultraviolet rays.
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| 5. | Snow blindness occurs due to reflection of ultraviolet rays from snow surface.
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| 6. | The decal changes color and darkens when exposed to strong ultraviolet rays.
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| 7. | Other dermatologists may worry about getting melanoma from exposure to ultraviolet rays.
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| 8. | Also, when the sun hits watercolors, they fade from the ultraviolet rays.
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| 9. | But they work only with the sun's ultraviolet rays, limiting their practicality.
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| 10. | These arcs heat the mercury droplets into vapor that emits ultraviolet rays.
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