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What change takes place in the skin when it is exposed to ultraviolet light?
Wiki User
∙ 9y ago
Most of the time, pigments in you skin, which are dark colored chemical compounds, absorb the UV light. Here, an electron is promoted in a chemical which can absorb this radiation and not be harmed. It releases this energy as heat.
In fair skinned people, this radiation promotes the electrons of proteins, lipids, and sometimes DNA. This can be bad, and can cause cancer, because DNA with promoted electrons is unstable.
Good thing we have the Ozone to protect us from this!
-Melanin production is increased to protect the DNA from this radiation. Melanin is a yellow-brown pigment, which is why the skin becomes darker (eg. tans, freckles) after exposure to UV.
-in moderate levels it stimulates formation of vitamin D
-if excessive UV absorbtion: you get burns
-skin cancer (melanoma) is also a possibility at prolonged exposure, because DNA in cells gets damaged due to UV light
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoUltraviolet ray are harmful rays. They affect the skin by causing cancer.
Wiki User
∙ 12y agoskin cancer :D
Wiki User
∙ 13y agoSkin Cancer
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