Hello everybody my name is Zohir Chowdhury, and we'll talk about non ionizing radiation so
anonymizing radiation what is it radiation that has enough energy to move atoms in a molecule
around or cause them to vibrate but not enough to move electrons is known as non ionizing radiation
examples of non ionizing radiations are extremely low frequency radiation e.l.f those are in power
lines am/fm radio station TV stations as well as radio waves microwaves radios an infrared
radiation as well as radiation from visible light coming from the Sun and finally ultraviolet
radiation UVA UVB or EBC are examples of non ionizing radiation ultraviolet radiation UV R is
one that we'll talk about today as well as radio frequency coming from cell phone so ultraviolet
radiation is part of the electromagnetic spectrum emitted by the Sun and it started subdivided into
UVA UVB and UVC and UVC is the one that would be most damaging in the upper atmosphere however all
of UVC is absorbed by the atmosphere so at ground level the one that is most harmful is actually UVB
as I will see in our next slide so by ultraviolet radiation a B and C both comes from outer space
from the Sun but the atmosphere absorbs all of EVC and then the ozone layer absorbs most of UVB
but a little bit of evb still filters into the ground which causes UV damage and then UVA gets
filtered most of it to the atmosphere some of it goes into the ground and this is needed to produce
vitamin D in skin cells effects of UV radiation essentially are temporary conditions such as burns
and temporary blindness long-term conditions are photo aging of the skin non-melanoma skin cancer
malignant melanoma retinal damage as well as Lance opacity in here we can see a study that was done
in three location one location is in Beryl a high latitude location mid latitude location in San
Diego California 32 degree north latitude and then in the southern hemisphere a high latitude but in
the southern hemisphere Palmer Antarctica as you can see in here this green location which is in
San Diego is expected to have more UV exposure throughout the season that UV index would be
higher in San Diego because the Sun shines more and similar would happen to equatorial areas that
are closer to the equator on the other hand in Barrow Alaska you can see that evey exposure is
much lower however in Palmer Antarctica which is in the southern hemisphere you exposure is much
higher and some cases much higher than San Diego as well especially in the spring and this is due
to the ozone hole that you many of you might have heard the ozone has has had a hole starting from
the late 70s early 80s when it was discovered and since then it has been enlarging enlarging and now
slowly just repairing it is estimated by 2050 the ozone hole will be repaired all over again
but meanwhile if you live in Alaska expect high UV radiation especially in the summertime the spring
time radio frequency radiation and cellphones it's another concern cell phones work because
of the radio frequency that gets emitted from the base tower into the cell phone to transfer
data and voice however as you hold the self cell phone close to your body the exposure to
non ionizing radiation is evident and because of the very high usage of cell phone it is extremely
important to understand the health effects of this non ionizing type of radiation that it may have on
tissues so IRC has looked at multiple studies which is something that you must look at and
IRC has classified video read radiation from cell phones to be possibly carcinogenic to humans to be
and the various classification of IRC which is an agency under the United Nations located in France
are expressed in here and cellphone has been classified as a to be types of radiation however
this is subject of a long still lot of research and study and I highly recommend that you actually
use the internet to look at the publication from IRC which was released in 2011 the press
release 2011 that talks about radiofrequency and its health effects so quick concept check
IFC classified radiofrequency radiation as Group one false it's to be alright thank you