Is light which is penetrate the earth barrier contain Ultra and infra light which is able to throught our body? I mean, something like X-ray which is able to penetrate our skin and give us a little detail under the skin?
No, it is absorbed like warm and tan.
Hi,
Ultraviolet, no. Just gives you a suntan/burn. Infrared,
maybe. It takes a lot of equipment and the right frequency
of infrared to lower the signal to noise ratio. Go into a dark
room and shine a flashlight through your hand. In the thinner
parts you can see veins (if your skin is light toned and some
veins are in the right place).
People have used short infrared pulses and time and intensity
sensitive detectors to see a bit further into flesh. They look for
echos of the pulses. Ultrasound and X-rays are cheaper.
Cheers,
Steve
of course there is a small amount of ultraviolet and infrared in sunlight
fortunately, most of it is "filtered out" by the protective layers of the atmosphere :U
when you are talking about particles that penetrate the skin, you are talking about x-ray and beyond
commonly refered to simply as "radiation"
again, most of it is filtered out by the atmosphere (and the Van Halen belt - lol)
generally speaking, the higher the frequency, the lower the level that reaches us :P
a few neutrinos make it all the way to earth and penetrate our bodies, but don't seem to be very harmful
Quote from: dedndave on February 07, 2012, 02:07:50 PM
a few neutrinos make it all the way to earth and penetrate our bodies, but don't seem to be very harmful
Hi Dave,
Actually, a truly massive number of neutrinos make it to Earth
and penetrate our bodies. (But have almost no effect.)
Cheers,
Steve N.
Maybe the neutrinos are why we don't have a much longer life span.
next time Z catches me looking at a pretty girl...
..."the neutrinos made me do it, hun" :P
Quote from: MichaelW on February 07, 2012, 08:11:52 PM
Maybe the neutrinos are why we don't have a much longer life span.
Hi,
Only if worrying about them has an effect. Neutrinos really do not
have much of an effect on anything. See the following for a good
description of the first successful attempt to detect solar neutrinos.
http://www.sns.ias.edu/~jnb/Papers/Popular/Scientificamerican69/scientificamerican69.html
Quotenext time Z catches me looking at a pretty girl...
..."the neutrinos made me do it, hun"
Try it, and let us know how well it works.
Cheers,
Steve N.
Edit:
P.S.
QuoteIt is convenient to introduce a special unit to express the neutrino-capture rate in solar-neutrino experiments. The unit is the ``solar-neutrino unit,'' or SNU (which we pronounce ``snew''). One SNU equals 10-36 capture per second per target atom. This implies that an atom of 37Cl would have to wait 1036 seconds, or roughly 10 billion billion times the age of the observable universe, before capturing a neutrino. Of course, in the 100,000-gallon tank, which contains about 2 x 1030 atoms of 37Cl, the average waiting time for a single capture when the rate of capture equals 1 SNU is only 5 x 105 seconds, or about six days per capture.
SRN
Quote from: dedndave on February 07, 2012, 08:40:44 PM
next time Z catches me looking at a pretty girl...
..."the neutrinos made me do it, hun" :P
how about this, " I know I was speeding, officer, but the superluminic neutrinos were pushing my car"
:U :U :U
Carlos
Thanks. :U
google(penetrating radiation)
(http://t0.gstatic.com/images?q=tbn:ANd9GcRsSnU15WhJctDz0dWUJ2DwC8Q6XL3noH3ldFmEB0BAUqBDC-le)
High-energy neutrons are very penetrating. The high-energy neutrons from "neutron bombs" can reach and kill the crews of heavily armored tanks and submerged submarines. And neutron radiation tends to induce radioactivity in the materials it encounters, creating a secondary hazard.
Don't forget cosmic rays, I just spent a fascinating 30 minutes on wikipedia.
One part got me
Quote...the Intel Corporation has proposed a cosmic ray detector that could be integrated into future high-density microprocessors, allowing the processor to repeat the last command following a cosmic-ray event.
http://news.bbc.co.uk/2/hi/technology/7335322.stm
edit: This is my new excuse
customer: so why did windows blue-screen?
me: must have been a cosmic ray event.
Come to think about it, this could explain a lot...
:bg
> ..."the neutrinos made me do it, hun"
This is a formula to end up sleeping with PHIDO (the dog). :P
oh - i see you know her well :lol
Quote from: MichaelW on February 08, 2012, 11:35:55 AM
The high-energy neutrons from "neutron bombs" can reach and kill the crews of heavily armored tanks and submerged submarines.
Yup.. She can sink a planet at 3 parsecs..
(http://1.bp.blogspot.com/-9gwy86XYML4/ThoqXpnPc_I/AAAAAAAAARU/04OlIdbFQ2c/s1600/600full-olivia-newton-john.jpg)
Quote from: vanjast on February 09, 2012, 05:59:22 AM
Quote from: MichaelW on February 08, 2012, 11:35:55 AM
The high-energy neutrons from "neutron bombs" can reach and kill the crews of heavily armored tanks and submerged submarines.
Yup.. She can sink a planet at 3 parsecs..
She is not Emma Samms. Imho Emma Samms more beauty.
(http://i2.listal.com/image/1784473/600full-emma-samms.jpg)
Anyway, is Gama ray exist on earth naturally?
Quote from: Farabi on February 12, 2012, 07:49:17 AM
Anyway, is Gama ray exist on earth naturally?
Yes, gamma rays are a byproduct of radioactive decay and since we have radioactive elements on earth they exist here naturally.
Do you know - sun is almost absolutely black body(term of phisics).
Farabi, what do you learn at the school ??? Russian students of the school learn this questions at 10-11years of studing. (Sructure of atom, experiments of Reserford and Rentgen, light and other radiations)
Quote from: Rockphorr on February 13, 2012, 11:40:09 AM
Do you know - sun is almost absolutely black body(term of phisics).
Farabi, what do you learn at the school ??? Russian students of the school learn this questions at 10-11years of studing. (Sructure of atom, experiments of Reserford and Rentgen, light and other radiations)
I never came to school years ago. And I did not found any forum better than here to answer such a questions. I tried asked on my country science forum, did not found any answers. But common knowledge the person here is far more better than any researchers here.
Quote from: Farabi on February 13, 2012, 01:16:18 PM
Quote from: Rockphorr on February 13, 2012, 11:40:09 AM
Do you know - sun is almost absolutely black body(term of phisics).
Farabi, what do you learn at the school ??? Russian students of the school learn this questions at 10-11years of studing. (Sructure of atom, experiments of Reserford and Rentgen, light and other radiations)
I never came to school years ago. And I did not found any forum better than here to answer such a questions. I tried asked on my country science forum, did not found any answers. But common knowledge the person here is far more better than any researchers here.
Can I ask you - What is your knowledge/educational level ????
I am a mathematician, I have a diplom of russian university in my region. (high education)
Do you know about book with lection of Feiman ???
lectures by Feynman :U
Degrees are a funny thing.... They are bought by people who can afford to study.... Often they do not mean that you have achieved anything original or new but simply that you have open access to tutorage and to the libraries of information of people who have achieved something, that you can recite....
I dont have a degree but more people with degrees ask me to do stuff for them than people without.... What does that tell you?
Quote from: oex on February 13, 2012, 05:20:42 PM
Degrees are a funny thing.... They are bought by people who can afford to study.... Often they do not mean that you have achieved anything original or new but simply that you have open access to tutorage and to the libraries of information of people who have achieved something, that you can recite....
I dont have a degree but more people with degrees ask me to do stuff for them than people without.... What does that tell you?
Yes, money distort reality. Someone have diplom without stuff. But it is basis that helps you understand world around you. Scholarship & broad-mindedness are more important.
Education helps a lot... but experience just talks
Quote from: Rockphorr on February 13, 2012, 02:34:28 PM
Quote from: Farabi on February 13, 2012, 01:16:18 PM
Quote from: Rockphorr on February 13, 2012, 11:40:09 AM
Do you know - sun is almost absolutely black body(term of phisics).
Farabi, what do you learn at the school ??? Russian students of the school learn this questions at 10-11years of studing. (Sructure of atom, experiments of Reserford and Rentgen, light and other radiations)
I never came to school years ago. And I did not found any forum better than here to answer such a questions. I tried asked on my country science forum, did not found any answers. But common knowledge the person here is far more better than any researchers here.
Can I ask you - What is your knowledge/educational level ????
I am a mathematician, I have a diplom of russian university in my region. (high education)
Do you know about book with lection of Feiman ???
My current degree is bachelor accounting, but Im depent too much on computers. I let my computers to handle anything. I just need to understand it once, and then let my computers done the rest.
penetration is the function by the energy as argument