You may have heard everywhere that you need protection from the sun. This is because the sun has harmful effects on the skin which can cause premature skin aging, skin cancer, sunburn and a host of other problems. Exposure to ultraviolet radiation from the sun contributes to 90% kulit.Banyak symptoms of premature aging skin changes are generally believed to be due to aging, like wrinkles and easily irritated, was also due to prolonged exposure to UV radiation. Here are a variety of UV rays Based on the wavelength.
UV-A
UV-A is the most uv rays cause radiation. UV rays-a covers 95 percent of the radiation that reaches Earth's surface and 30 - 50 times more common than uv-b rays, although less intense. UV-A radiation was thought to have little effect against skin damage, but now studies show that UVA is a major contributor to skin damage and wrinkles. UV-A penetrates the skin deeper than UV-b and work more efficiently. UV-A radiation penetrates to the dermis (second layer of skin) and can damage the fibers in it. The skin loses elasticity and becomes wrinkled. The intensity of UV-A radiation is more constant than the UV-b (all day). In addition, UV-A can penetrate glass.
UV-B rays
Uv-b rays are usually only damage the outer layer of skin (epidermis). This ray has the highest intensity between the hours of 10:00 and 14:00 when bright sunlight. Some UV-b rays the sun blocked by the ozone layer in the atmosphere. Uv-b does not penetrate glass.
In small amounts, uv-b radiation is useful for the synthesis of vitamin d in the body, but excessive exposure to these rays can cause skin redness / burning and harmful effects of free radicals that trigger the synthesis of erythema and cataracts. Uv-b rays can also cause photochemical damage to the dna cells that trigger the growth of skin cancer.
UV-C
UV-C radiation caused the biggest danger and cause the most damage. But fortunately, the majority of these rays are absorbed in the ozone layer atmosphere. With the widespread damage to the ozone layer due to the release of certain chemicals into the environment (ozone depleting chemicals) such as freon ac and others, feared to be a lot of uv-c that qualify for the earth and cause various adverse effects in humans.
tips on protection from ultraviolet radiation
1. Seek shade
Seek shade when you are doing outdoor activities in the afternoon or evening (especially on at 10:00 until 15:00). Do not think you are safe just because of overcast skies. Ultraviolet radiation can pass through clouds and fog.
2. Wear long-sleeved shirt, long pants, gloves, broad-brimmed hat or umbrella
Avoid radiation through thin clothing. When using an umbrella, choose an umbrella made opaque.
3. Use a moisturizer (lotion) sunscreen and repeat the application several times, according to the directions on the label.
Choose a broad spectrum sunscreen with a sun protection factor (spf) of at least 15. Sunscreen does not provide full protection. Do not be too long in the hot sun even if you use sunscreen. Seek the shade.
4. Wear sunglasses
Wear sunglasses that filter out ultraviolet radiation. Your eyes do not have a natural defense against the sun, and eye damage from UV rays can cause cataracts. The use of sunglasses to block more than 95% UV-A radiation.
5. Give extra protection to infants and children.
The skin of infants and children are more sensitive than adult skin, so they need extra protection when out in the hot sun for a long time. Children should wear a hat, long-sleeved clothes and trousers. When you apply sunscreen on the child, make sure that has gripped parts of their bodies are most vulnerable, including hands, ears, face, and n
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