This article will
describe how and why sun exposure is dangerous especially when combined
with a depleted ozone layer. Our sun emits a spectrum of light. The
visible light spectrum which we can see are the colours of the rainbow
with red having the lowest frequency and violet having the highest
frequency. There are colours emitted by the sun with frequencies that
the human eye cannot detect. Ultraviolet or UV radiation is invisible
to the human eye and has a frequency higher than that of violet.
Ultraviolet radiation is divided in to three frequencies UVA UVB and
UVC. UVC radiation has the highest frequency of the tree and is almost
completely blocked by the ozone layer. Which leaves us primarily
exposed to UVA and UVB radiation. Lets first look at UVB radiation. UVB
radiation only penetrates the surface of the Skin superficially and it
is the main cause of Sunburns. It Damages the Carotinecites which are
the Cells that our skin is made of. Our immune system will respond by
increasing Blood flow to the damaged area and producing enzymes that
cause inflammation. UVB also contributes to skin cancer and causes
cataracts.
UVA radiation has a lower frequency and penetrates deep
in to the lower layer of the skin where it will cause the release of
enzymes that break up the collagen and the elastic fibers. This will
lead to rapid ageing of the skin. Because I know you are not going to
get this unless I am really going out of my way to make a story of
this. Many people tan because they want to look good, but the truth is
if you tan regularly you will not look good for very long. Because UVA
will almost literally age your skin overnight. Skin will become slack
and loose its elasticity. The breakup of collagen will make you very
wrinkly very soon. Your skin is going to look like the skin of an
orange quiet literally, and you absolutely must understand that this
damage is irreversible. But what is perhaps even more alarming is the
UVA radiations ability to cause skin cancer such as melanoma, and you
should be aware if you thought the sun was dangerous and I'm telling
you explicitly that it is, Tanning booths are much more dangerous than
the sun. Tanning boots emit around 90% UVA radiation. Its UVB emission
is therefore low in relation which might make it seem as if you'd burn
slower while the UVA is doing extreme damage ageing your skin and
making the possibility of developing skin cancer a possibility.
Where is the Sun most dangerous.
The
Sun is most dangerous when it stands highest in the sky which is
exactly halfway between sunrise and sunset. The Angel at which the Sun
hits the earth is a mayor contributing factor to the amount of
radiation that reaches the earths surface, The closer the angel is to
90 degrees as in the sun being right above your head, the thinner the
layer of ozone and atmosphere the sun has to pass trough which makes it
more dangerous. The angle is not only determined by what time of the
day it is but also by the latitude of your geographical location and
the season. The closer to equator you are the to higher the sun will
stand and the angle is always greater in summe than it is in winter.
The final factor is of course the condition of the ozone layer above
you If there is a gaping hole in the ozone radiation can be severe even
if the sun stands at a lower angel.
Sun Protection
Almost
all sunscreens only block UVB radiation which will give you falce
security. The blocking of UVB radiation will keep you from getting
sunburned while UVA radiation is still fully penetrating your skin
breaking down your collagen which ages your skin and increases your
risk of skin cancer. SPF factors are an indicator of how long it will
keep you from getting sunburned and is therefore only an indicator of
UVB protection not UVA. It is best if you Protect yourself by covering
up in long sleeve clothes and a sun hat or legionars hat. And don't
forget your forearms and hands also need protection. Keep in mind If
you are a white skinned person evolution has not designed you to expose
yourself to equatorial sunlight. In the north where fair skinned people
originate there is a shallow angle between the earths surface and the
sun.
This article was written for your own good please take it seriously. The Kaiser minding your healt. Am I not nice.
Where the sun gets its energy from for the curious minds.
The
Sun is 5 billion years old and will burn for another 5 billion years
before it runs out of nuclear fuel. The Suns energy comes from a
process called thermo nuclear fusion. It is a sphere of superheated
plasma. Under this high heat and pressure in the core of the sun the
plasma gets compacted to a density several times that of lead. This
causes the positively charged helium nuclei's which would normally
repel each other to smash together with enough force to jump across the
potential wall and fuse in to helium atoms. In the world of quantum
mechanics the classical principal of conservation of mass appears to be
violated. This means that the constituent particles namely Protons and
Neutrons of different Elements do not have the exact same mass. This
violation of the conservation of mass is called the mass defect. Mass
and energy are the same thing, Einstains famous equation “Energy = Mass
times the speed of light squared” can be used to calculate exactly how
much energy is being generated by the mass defect during the thermo
nuclear fusion process. The mass defect between the hydrogen being
fused and the resulting helium is the exact amount of mass that is
turned in to energy. The sun converts approximately 600 million tons oh
hydrogen in to 595 million tons of helium every second. That is a total
mass defect of 5 million tons every second.
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