how does the sun cause damage to the skin?
452427
solar radiation - UV rays are damaging to the DNA of skin cells and can result in cancer
1071239
When the skin cells get too much UV radiation it triggers the cells to make more melanin and put it up above them selves, shielding their nucleus from the UV.  Some races naturally make more of this at a baseline than others.
685801
These are the effect of intense sun light on fruits.These balck spots are sun burns on fruits,where the fruit tries to protect it from sun by changing it's color.
810165
put differant sunblocks on differant parts of your arm or some thing then go sit in the sun ad get burned
231076
The sun emits most of its radiation in a wavelength band between 0.1 and 4.0 micrometers (µm). The amount of radiation emitted from a body increases exponentially with a linear rise in temperature.\n \nSee fig 6f-2 in the link below\nhttp://www.physicalgeography.net/fundamentals/6f.html
570959
sun is some thing which solely effect that
432601
the UV waves cause heterolytic fission of chemical bonds creating "radicals" which are very reactive species.  They will react with pretty much anything.  The UV radiation is therefore breaking down the skin and the colour molecules in paint and clothes, making them look like they are losing their colour.  The purpose of sun-tan lotion is not only to stop the UV radiation getting to your skin, but also to mop up all the free-radicals formed before they do any damage.  Skin cancer is caused by this process.  You are essentially changing the structure of the skin.
653585
tanning is a reaction of your skin to protect itself from UV rays, melanin is produced to help absorb some of the radiation.  Sunburn is an actual burn, damage done from overexposure to the radiation.  What determines the difference is the intensity of the radiation and the duration.
351777
Sunlight helps to to metabolize vitamin D, warms the planet to a pleasant temperature conducive to life, and provides a direct energy source for solar power, and is a great source of energy for chloroplasts, which happen to be how plants excrete oxygen that we breathe.  Basically, we would be dead without the sun.\n\nSunlight also has ultraviolet light and various other radiations, most of which are currently blocked by our ozone layer.  Sticking with ultraviolet light, sunlight can damage the skin, leading to skin cancer.  Too much exposure can result in dehydration and death.  Increased amounts of ultraviolet light may also interrupt the chloroplast processes in plants, such that too much will cause plants to die instead of producing oxygen.
153489
The sun is radiating heat which is absorbed by your body and clothes.  The body tries to maintain a consistent internal temperature of around 98.6 degrees.  As your body and clothes absorb heat energy from the sun, your body will attempt to compensate for this additional heat by causing your skin to perspire.  As the perspiration evaporates off of your skin, it carries away some of the heat from your body, thus lowering your body temperature.
1069028
Vitamin E, one of the antioxidants, can be taken regularly as part of a daily vitamin and mineral supplement or spread as in an ointment on sunburn. Vitamin C is another antioxidant that will help prevent severe damage from sunburn and shorten its effects. Selenium is a mineral that will help fight sunburn.
1139871
Strictly speaking, the sun does not burn. At least, not the way that, say, a wick on a candle does. The small fires we're all familiar with are created by a chemical reaction betweena fuel, such as oil or coal, and oxygen. The sun's writhing surface, on the other hand, is the result of a nuclear reaction that fuses hydrogen to form helium.
826620
everything which is living or gets energy from a star in our case the sun since the uv rays or blocked and we get only the filtered sun rays though too much into this we will hurt ourselves as everything is good only if taken in a limited quantity same here it really does work as it illuminates you're whole body as a matter of fact one of the main things and most essential thing that you get from the sun is vitamin c and this is got merely standing in the sun but while doing exercise with regard to the sun such as in yoga surya yoga as you have said does touch upon it,it acclerates protein development in you're body should not be in noon it should be done either in the wee hours of morning or while the sun is mild in the evening it helps in body proteins and vitamins also in anti ageing properties where it helps you're skin glow that is raise you're skin tone level step by step.
1000863
Too many to list I think, and not being a doctor of chemist I wouldn't know - but I think there are some anti-depressants that may cause the skin to be UV sensitive as I seem to remember someone on various anti-nuts-o medications that effected their sensitivity to the sun.
837108
The sun "burns" on the concept of nuclear fussion, where hydrogen is converted to helium. Once all hydrogen has been converted it then produces lithium and all other elements in the periodic table until iron.\n\nThis process creates energy and is what you are referring to as "burning".\n\nNuclear fussion is a nuclear reaction. Processes like creating a fire are chemical reactions involing oxygen
611822
Sun poisoning is most likely to occur during hot seasons when ultraviolet light is strongest. It's triggered by exposure to the sun, usually combined with sunburn. It's especially likely in children who take medications that cause photosensitivity. The most common drugs include tetracycline antibiotics, thiazide diuretics, sulfa drugs, and oral contraceptives. It's not a precursor to skin cancer, so don't worry. Of course, long-term exposure to the sun can cause skin cancer, but just because you get sun poisoning doesn't mean your'e going to get cancer.
593275
Solar Power harnesses the energy of the sun to turn water into high pressure steam. The sun gives panels which heat the water kinetic energy to affect the interaction energy of the water (like how you get a sunburn). The steam rotates a turbine to generate power.