Radiation

Question: radiation? Why does electromagnetic radiation in the ultraviolet region represent a larger energy transition than does radiation in the infrafed region?

Answer: Ohh well have u ever heard of the plank's equation? E=hv=hc/w where E is the energy of the particle light(Photon) or the energy associated with one photon of radiation.. and v=frequency of that radiation.. c=velocity of radiation(light) w=wavelength of radiation.. as the wavelength of radiation increases from UV rays to Infrared rays,,, the frequency of radiation decreasea from UV rays to infra-red rays.. and hence, the energy associated with one photon of radiation decreases in the region from UV rays to infreared rays.

Question: What is the difference between heat and radiation? I am trying to understand the difference between the words heat and radiation. Is radiation, like heat, something that you can feel? Heat is measured in degrees and radiation is measured in rads. I keep hearing stories about the radiation that cell phones put out. My cell phone gets warmer the longer I use it. Is it radiation that I am feeling?

Answer: Radiation is energy given off in waves, like gamma radiation or microwave radiation. What we perceive as "heat" is only radiation in a certain wavelength range (infrared radiation). Maybe your cell phone gets warmer while you use it because you're holding it in your hand?? Or, it probably gets warmer because the electronics in it operate by a transfer of electrons, whose friction generate heat; this is why computers need to be kept cool.

Question: How is nuclear radiation different in an X-Ray Machine than a Nuclear Bomb? I heard that X-Ray devices use nuclear radiation and I also read that nuclear bombs also use nuclear radiation. So, what is the difference between the nuclear radiation in the two devices?

Answer: there are a couple types of ionizing radiation, that is radiation that can ionize molecules in your body by kicking electrons off them. When this happens the molecules become highly reactive and cause damage. Alpha particle - atom decays and releases He-4 nuclei carrying a 2+ charge, very ionizing but cannot penetrate dead skin and is only dangerous if inhaled (radon). Beta - atom decays and emits positrons and electrons from the nucleus, here a proton in the nucleus of an atom turns into a neutron and releases a positron or a neutron turns into an proton releasing an electron. Neutron - particles that can cause nuclear reactions when absorbed by a nuclei or ionize molecules. Gamma - high energy light, emitted when a nuclei relaxes from an excited state such as after a nuclear reaction. X-ray - also high energy light, emitted when an electron drops energy levels to fill an electron hole created by ionizing radiation or some other mechanism or when a high energy electron slows down (beta = high energy electron) When a nuclear bomb explodes all of these types of radiation are released. When you get an x-ray only x-rays are released. In an x-ray machine electrons are accelerated toward large nuclei and as they approach the large atoms they slow rapidly and x-rays are emitted.

Question: What radiation do we receive when in a plane? I hear differing stories about the radiation we receive when we are a passenger on board a plane. I`ve heard we receive x-rays, gamma radiation and cosmic rays during a flight. I`ve also heard we only receive gamma radiation. I`ve also heard 1 single flight from UK to Spain is equal to the amount of radiation received when you have a Chest X-ray. What forms of radiation are we exposed to during a flight and in what amounts?

Answer: Gamma rays, Cosmic rays and nuclear particles from space. UV, x-rays, and charged particles from the sun. All radiation isn't the same, the dosage you get is an aggregate of all those things.

Question: How could you measure radiation in your home? How could you measure the background radiation in your home. What two units could it be measured in? How can certain foods increase the amount of radiation? Why do atoms emit radiation? Any help?

Answer: Geiger counter. http://www.google.com/products?q=geiger+counter+for+sale&rls=com.microsoft:en-us:IE-SearchBox&oe=UTF-8&rlz=1I7GWYE&um=1&ie=UTF-8&sa=N&hl=en&tab=wf Radiation detector. http://www.google.com/products?q=radiation+detector&hl=en&aq=0&oq=radiation+ Radiation badge. http://www.google.com/products?q=radiation+badge&hl=en&aq=f Radon test kit. http://www.google.com/products?q=radon+test+kit&hl=en&aq=0&oq=radon There are many units of radiation intensity and exposure. http://en.wikipedia.org/wiki/Radiation_units http://en.wikipedia.org/wiki/Ionizing_radiation_units http://en.wikipedia.org/wiki/Background_radiation_equivalent_time Animals higher on the food chain tend to be more radioactive than those lower on the chain because certain biological processes concentrate radioactive substances. Products imported from contaminated areas, like Chernobyl, are more radioactive. Atoms emit radiation when the nuclei of unstable isotopes decay.

Question: How much is a radiation therapist can make in the Bay area? I want to become a radiation therapist but I'm still wondering radiation theapist still a good one also? Which one do you guys prefer? Radiology technician or Radiation therapist. Please help! Thank you so much! I meant the different between radiology tech and radiation therapist. Which one is better? Thx

Answer: The market is becoming flooded with people in school for Radiation Technician. Try shadowing someone for a day and make sure either one is a career you truly want. Try the website below for interests, skills and abilities needed on both, and for an estimate of yearly wages in your state. Click on CareerInfoNet and you will find the information.

Question: What does radiation do for cancer patients? We found out today that my grandmother has cancer and my mother said that the oncologist is planning on using radiation to ease her pain. My question is, what does radiation do? I know, eases pain, but how? She has lung cancer which has spread to her bones (her back, more specifically).

Answer: "Radiation, which is also used to treat cancer, can be very helpful in alleviating cancer pain in some circumstances. It can be used to reduce the size of some tumors which, in turn, takes pressure off organs and nerves that the tumor touches. It can also be used to treat the pain of cancer that has spread to the bones, the brain, blood vessels, nerves and spine. Treatment with radiation is done by specialists called radiation oncologists, who will determine the dosage of radiation needed and oversee the treatment itself. In some instances, radiation is performed by implantation, when radioactive material is placed inside the body for a period of time, during which it kills cancer cells. "

Question: How much radiation does a normal computer LCD screen give off? Also, does it emit radiation when the screen is turned off but the computer unit is on? And does the computer unit emit radiation too?

Answer: The only radiation it gives off is from the charged particles such in electricity. It makes nothing when off except light discharge.

Question: How to perform a radiation demonstration using a candle? Today at school, we were given a task to create a demonstration using a candle, some wax, a prism, a paper spiral, and a copper rod to demonstrate all 3 types of heat transfer, which are conduction, convection, and radiation. Our group demonstrated conduction and radiation, however we don't know how to demonstrate radiation with the materials we were given. So we need some help and any answers are appreciated :).

Answer: The paper spiral would be to demonstrate convection as currents rose above the candle and caused the spiral to swivel. The copper wire would show conduction as heat moved through it and could melt the wax. Radiation goes out in all directions, so heat could be felt along side the candle. The prism might be used to show that the ray of candle light goes through it and bends.

Question: What is the difference between the Electromagnetic radiation and an electromagnetic field? What is the difference between the Electromagnetic radiation and an electromagnetic field or electromagnetic spectrum? What is electomagnetic radiation ? Like what type of radiation are they talking about? And what is spectrum of electomagnetic radiation mean? Why do people call electronic devices or electrical devices radio frequency or part of the spectrum when it is not Radio,Microwave,Infrared,Visible, Ultraviolet,X-rays ,Gamma rays. I know every electronic devices when turn on or electrical devices when turn on have Electromagnetic field or any electric current have a Electromagnetic field .

Answer: You actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. Here are the different types of radiation in the EM spectrum, in order from lowest energy to highest: The electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. It is one of the four fundamental forces of nature (the others are gravitation, the weak interaction, and the strong interaction). The field propagates by electromagnetic radiation; in order of increasing energy (decreasing wavelength) electromagnetic radiation comprises: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. The field can be viewed as the combination of an electric field and a magnetic field. The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field. The way in which charges and currents interact with the electromagnetic field is described by Maxwell's equations and the Lorentz force law. From a classical perspective, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner; whereas, from a quantum mechanical perspective, the field is seen as quantised, being composed of individual photons.

Question: What are the sources of radiation exposure while driving a car? I have heard that driving a car gives a person a higher level of radiation exposure than say, walking. What are the main sources of this "ionizing radiation" that would be harmful to humans while driving a car? I have also heard that say "Rock climbing" for 75 minutes can give you 1 msv of radiation.. if this is true, than what about WALKING on the ground which is also made out of rocks in one way or another. What about the cement in my bassment....

Answer: he quietness of a manhole cover cannot compare with the wild vapours of nylon I sense in your larynx.

Question: What is the difference between radiography and radiation therapy? I am a college student looking to go into radiation therapy in Ohio. I see all of these programs titled radiography or radiation tech, but it doesn't sound like radiation therapy. Any help? Also, if you know of any schools for radiation therapy in Ohio? Thank you!

Answer: Radiography is making of an imaging using ionizing radiation (x Ray) R therapy uses ionizing radiation to change tissue as a primary goal. Like to distroy a tumor. A rad tech takes x ray filmss, C-T scans and with special training may include MRI exams. Although MR does not use ionizing radiation.

Question: What type of radiation is the most dangerous for human health? I am doing a powerpoint presentation on the effects of ionising radiation on the body, and I need to know what type of radiation is the most dangerous to humans. (eg. alpha, beta or gamma). Could you please also explain why.

Answer: Alpha because it's the most ionising inside the body

Question: How can Electromagnetic Radiation travel without a medium? If Electromagnetic Radiation can travel through the vacuum of space then it can travel without a medium, but shouldn't this be imposable? Or is it true that Electromagnetic Radiation uses the medium of existing magnetic fields, such as earths, distorting these fields much like sound waves do to air? And if so how can this have a direction of travel?

Answer: Electromagnetic waves travel through a vacuum and any other physical medium slows or stops their progression. They do not use existing magnetic fields as a medium, though they do interact with them. An electromagnetic wave is nothing more than an a propagation of a changing electric and magnetic field. these fields are always perpendicular to each other and travel in the direction of E x B, where E and B are vectors indicating the direction of these fields. Its because these are electric and magnetic fields. These fields are just regions where forces are exerted on charged particles, they are not made of particles themselves in the same way that sound waves are made from air molecules.

Question: How long after radiation exposure do victims start experiencing symptoms of radiation poisoning and die? I'm starting to write a horror movie...And I would like to know exactly how long after being exposed to radiation do victims start seeing symptoms, and how long until they actually die. How much radiation would it take to kill somebody within a few hours?

Answer: It depends on the dose recived. While it does depend on the radiation type, if you measure the dose in REM (or the Sievert it's SI Unit), the you already factored in the radiation type. I only use Wikipedia when I can verify the information, but this is useful and saves you the trouble of digging around in a health physics, nuclear engineering, or radiation biology text. http://en.wikipedia.org/wiki/Radiation_poisoning#Table_of_exposure_levels_and_symptoms

Question: What is background radiation and why is it present? I understand the physics behind background radiation and that all particles emit radiation but i don't get how to answer this question from an a- level biology exam question talking about mutations. Thanks for all your help xXx

Answer: background radiation is naturally occuring radioactive elements that exist in nature. Why is it present... good grief that's a good question. God, this is where you would step in with an explanation lol