What Rays Are And How They Affect One 's Skin

According to Allen, “The sun radiates energy in a wide range of wavelengths, most of which are invisible to human eyes. The shorter the wavelength, the more energetic the radiation, and the greater the potential for harm. Ultraviolet (UV) radiation that reaches the Earth’s surface is in wavelengths between 290 and 400 nm (nanometers, or billionths of a meter). This is shorter than wavelengths of visible light, which are 400 to 700 nm.” When these UV rays hit your skin, they can directly damage your DNA, cause a painful burn, and premature the aging of the skin, which are caused by UVA. The UV rays that we are exposed to are UVA and UVB rays. (Sottery) UVA is a long, flowy line and UVB is a tighter, patterned line. UVA rays contribute to melanoma, deeply passes through skin, affects skin at any time of day, passes through clouds and glass, and is responsible for about 95% of UV radiation that reaches earth. UVB can burn skin, passes the skin’s outer layer only, affects skin most intensely during summer, causes near-immediate effects, can partially penetrate clouds but not glass, can contribute to skin cancer, and accounts for about 5% of the sun’s energy that reaches earth.

The basic component in tanning is ultraviolet light. Ultraviolet light, whether produced by a tanning unit or by the sun, contains two components; UVA and UVB. These are the two types of ultraviolet radiation that are known to negatively effect the skin. UVA has a longer wavelength that causes photoaging and can produce some melanomas. UVB has a shorter wavelength that also causes photoaging and has been implicated in skin cancers. Photoaging is the premature aging or deep wrinkling of skin. Indoor tanning units utilize both forms of light waves to tan a person with a minimized risk of sunburn. Tanning outdoors does not give you this option because the sun omits every type of UV rays, so a person is more likely to burn. A person’s skin epidermis consists of two layers: The germinative layer and the horny layer. Another name for the germinative layer is the “living layer.” And another name for the horny layer is the “dead” layer. When exposed to ultraviolet light, melanocytes in the germinative layer produce melanin that is absorbed by surrounding cells. Melanin is a dark pigment found in the pigment-bearing cells of the skin, and melanocytes are epidermal cells capable of synthesizing melanin. This creates a protective barrier from ultraviolet light reaching deeper into the layers of the skin. The pale pink melanin granules are stored in the core of keratin cells. UVA darkens the melanin,

Have you ever felt the “false sense of security that [you] may not feel under direct sunlight” from a tanning bed (Jeffrey)? Your body relaxes, you feel serene, and you get a golden glow. Some teens strive for this feeling...and the tan. Tanning is the skin's response to injury, according to Arielle Kauvar, M. D. The exposure of UV rays over time can cause skin cancer. Skin cancer is the growth of abnormal growth of skin cells that forms in the tissue of the skin (Skin Cancer). Melanoma, the most dangerous type of skin cancer, can come from UV rays. From 1998- 2008, the number of cases of Melanoma has increased by about

    Most people are exposed to large amount UVA rays in their lifetime.They account for up to ninety-five percent of

Prolonged exposure to the sun has many different effects on one’s health. Overexposure to the sun affects people’s health in positive and negative ways. It causes basal cell carcinoma, a skin cancer caused by overexposure to the sun. Prolonged exposure to the sun can also lead to squamous cell carcinoma,

Before one can discuss harmful effects of tanning equipment and increased sun exposure, one must be familiar with the components of ultraviolet light and how affects the skin. Sunlight contains two types of ultraviolet (UV) light: UVA and UVB. UVA rays consist of longer wavelengths that penetrate deep into the dermal layer of skin. Limited exposure to UVA rays causes skin to tan; however, most experts agree that overexposure to UVA can lead to other long-term skin damage. UVB rays’ wavelengths are much shorter, affecting the outermost layers of skin. UVB rays are known as the "burning rays" and are considered more dangerous. Tanning beds and sun lamps generally emit 93% to 99% UVA

UV radiation, such as that from the sun can be very harmful. It has been shown to cause many different mutations within cells, leading to issues for the organism such as death or disease. One of the most prevalent sources of UV radiation for humans is the sun. It’s very important for us to know the extent of cellular damage that can be caused by this radiation, as to know how harmful the sun’s rays are to us as humans. One way that the damage caused by the suns radiation can be tested is through the model organism yeast. For this lab, we exposed two different strains of yeast to UV radiation to test its affects. One strain was able to self-repair, while one was genetically altered so that it could not. Observations were recorded at

Ultraviolet, or UV rays can damage skin cells which can lead to skin cancer. The SPF on sunscreen bottles stands for Sun Protection Factor, and refers to how well the sunscreen protects our skin against one type of UV radiation, called UVB. Some of the UV radiation from the sun still gets through the sunscreen and gets absorbed by our skin. Sunscreens are usually made up

It does provide the obvious risks that come from UV tanning, but provides ways to prevent them while still being able to tan. The article also has a section on sunless tanning and how it could be the future of the UV protection, which a think is a key component of the source since many people don’t even consider it when wanting a natural, golden tan because of preusumptions that it makes the skin unnatural or

Ultraviolet (UV) radiation is present in normal sunlight and sunlamps. “The sun emits energy over a broad spectrum of wavelengths: visible light that [one] can see, infrared radiation that [one] feels as heat, and ultraviolet (UV) radiation that [one] cannot see or feel. UV radiation has a shorter wavelength and higher energy than visible light. It affects human health both positively and negatively” (U.S. EPA). There are multiple types of ultraviolet radiation known to scientists and each affects human in different ways. “The longer ultraviolet rays (UVA), which penetrate deep into the skin, are responsible for tanning. Shorter rays (UVB) damage superficial skin cell layers, causing sunburn” (Harvard). Medical researchers at the Skin Cancer Foundation found that “the cumulative damage caused by UV radiation can lead to premature skin aging (wrinkles, lax skin, brown spots, and more), as well as skin cancer” (Skin Cancer Foundation).

The sun contributes to different health conditions, in its own way. Nonmelanoma and melanoma are both a result of the harmful ultraviolet radiation from the sun. Even though basking in the sun on a beach may seem fun and enjoyable, the excessive exposure to the sun can change the texture and look of the skin, resulting in skin damage. Cataracts, which are also caused by increased UV exposure, can cause an individual to lose their sight, if not treated. Increased heat can also cause dehydration. The immune system can be greatly affected by excessive sun exposure, affecting the body’s ability to fight infections.

Ultraviolet (UV) radiation associated with skin cancer is one of the most common cancers. If the skin is exposed to the sun, some humans would have a higher risk of skin cancer. Sunscreen is a source that protects the skin, which is highly recommended to be used if your skin is sensitive to the sunlight. This theory will show how students who attended Human Biology Lab class approach on how certain level of SPF in sunscreen can protect the skin. There were significant differences found in the different brands, but not a major significant in some. In the end, the results showed that the UV intensity data were accurate.

A little sun a day is in fact good for the skin but extended periods of sunlight can do much harm. This is the most common cause of hyperpigmentation because melanin soaks up the sun’s uv ray energy. Sun damage may not even show until years after exposure!

Every hour at least one American will die of skin cancer caused by exposure to the sun. These statistics are alarming and most people are unaware that the sunshine that we all love so much is in fact a threat to our health and good looks. It is up to us to educate ourselves and our children on the harmful effects of sun exposure on the human body like premature aging, physical damage to the body, and cancerous diseases.

Getting some sun is essential to human health despite the risks of the skin cancer. There is much more benefits that come with the exposure to the sun than harm. Vitamin D that our body produces when we are exposed to the sun is very efficient in curing so many diseases. It protects from arthritis, diabetes, infectious diseases, multiple sclerosis and some kinds of cancer, just to name a few.