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Everyday Sources of Radiation

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The idea of being exposed to sources of everyday radiation conjures up all sorts of mental images, and none of them are positive. At the very best, you’ll be thinking about Blinky, the three-eyed fish from "The Simpsons," at worst... who knows. However, all day every day, you are being exposed to radiation. Walking to a friend’s house? Radiation. Cooking yourself a snack after school? Radiation. Playing football, sitting and reading, teasing your cat? You guessed it—radiation.

Radiation is all around us no matter what we do. Radiation occurs naturally in the air, earth and water we're constantly in contact with. More radiation comes from various manmade sources—cigarettes, microwave ovens, and even cell phones. Use this playlist to learn more about radiation, and the ways in which it may or may not affect your everyday life.

Hank explains the whole story about radiation - the good, the extremely helpful, and the bad. Like SciShow on Facebook: Follow SciShow on Twitter: radiation, heat, light, idttmwytim, energy, visible light, infrared, microwaves, ionizing radiation, non-ionizing radiation, radio waves, x-rays, ultraviolet, gamma rays, waves, alpha particle, beta particles, proton, neutron, electron, atom, scishow, science, physics, hank green
There seems to be confusion about what radiation is and where it comes from. Many people believe it is the radiation that comes directly from nuclear power plants that poses a threat to public safety. In fact it is the radioactive atoms, which can escape in the event of an explosion, that pose a safety risk. They can be scattered by the wind over hundreds of kilometres. Then they may be ingested or breathed in. If they release radiation at this point, it is damaging to the body's molecules and cells because the radiation is delivered directly to tissues.
Learn about the different types of radiation in this physics video from the virtual school. Alpha particles, beta particles and gamma rays... what are they and how do they differ? Introducing 'Alpha Man', 'Beta Boy' and 'The Great Gamma'! Get in touch: Find out more: Follow us: Friend us: Teach the world. This video is distributed under a Creative Commons License: Attribution-NonCommercial-NoDerivs CC BY-NC-ND
What is radiation? Are all types harmful? What are the most common sources of damaging radiation? Most people view radiation as harmful and negative without understanding what makes it potentially damaging and which forms should be avoided. For example, many felt radiation from mobile phones probably caused cancer but few focused on the carcinogenic effects of UV rays.
Watch more Cancer & Disease Prevention videos: Alarmed by news reports that cellphones could possibly cause brain tumors? Here's what we know so far. Step 1: Understand cellphone radiation Know what "cellphone radiation" is. Cellphones emit radiofrequency energy, a form of non-ionizing radiation. Ionizing radiation, the kind produced by X-ray machines, has been linked to cancer; nonionizing radiation has not. Step 2: Understand a research finding Understand the classification of the International Agency for Research on Cancer, which evaluates environmental and lifestyle factors for possible links to cancer. The I.A.R.C. classifies cellphones as a "possible" carcinogen, meaning it's not certain whether they pose a cancer risk. Tip The International Agency for Research on Cancer also lists coffee and pickled vegetables as possible carcinogens. Step 3: Understand the confusion Understand why the I.A.R.C. classification is confusing. Some studies into possible links between cellphones and cancer have found a higher risk of brain tumors, while others have found a lower risk. Some scientists point out that cellphones have been in use for years with no subsequent increase in brain tumors; others say there hasn't been enough time to determine the effect on younger generations who began using cellphones in childhood. Step 4: Play it safe Play it safe by reducing your exposure to cellphone radiation. Use speakerphone or a wired earpiece -- a ferrite bead will lower your exposure even further. Also limit the time you're on your cellphone while walking and when you have a weak signal; cellphones emit more radiation when they're in motion or far away from a cell tower. Tip Avoid wireless earpieces, which emit radiation right at your ear, albeit at lower levels. Step 5: Stay tuned Stay tuned to new research -- the jury is still out on cellphone radiation and cancer risk. In the meantime, it wouldn't hurt to talk less on your cellphone and send text messages whenever possible. Did You Know? 85 percent of Americans 18 and older own a cellphone.
The radiation that comes out of X-rays is the invisible light spectrum known as ionizing radiation or electromagnetic radiation. Find out how the radiation produces images with information from a registered radiology technician in this free video on X-rays. Expert: Raymond Hayduke Contact: Bio: Dr. Vimai Patel is a radiologist at Gateway Radiology in Pinellas Park, Fla., home of the strongest magnet in Pinellas County. Filmmaker: Christopher Rokosz
How does NASA "see" thermal radiation? This video explores what infrared energy is and how NASA detects it to study our Earth's systems more completely. Satellite measurements over time allow scientists to study seasonal changes in local and global temperatures, as well as longer term trends in temperature over time. This video also includes a look at the experiment Sir William Herschel conducted that led to the discovery of infrared. This video is public domain and can be downloaded at: ‪ Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: ‪‬ Or find NASA Goddard Space Flight Center on facebook: ‪‬ Or find us on Twitter: ‪
Microwave ovens are a quick and easy way to heat food. How exactly do they work? Join Trace as he discusses how microwaves are able to heat food so quickly. RSVP to our live hangout with NASA happening on August 27th at 4pm PDT: Read More: How Do Microwaves Work “Microwave ovens don’t operate in the same manner as conventional ovens.” How Microwave Cooking Works “T­he microwave oven could be one of the great inventions of the 20th century -- hundreds of millions of homes worldwide have one.” How Does a Microwave Work? “Percy Spenser was conducting radar experiments during World War II when he got close to a microwave-emitting tube and accidentally melted the candy bar in his pocket.” Free amino acid concentrations in milk: effects of microwave versus conventional heating. “Microwave effects on free amino acid concentrations in milk versus a water bath heating were investigated in view of their importance for infant growth.” Microwave Oven Radiation “Microwaves are used to detect speeding cars, to send telephone and television communications, and to treat muscle soreness.” Microwaving food in plastic: Dangerous or not? “When food is wrapped in plastic or placed in a plastic container and microwaved, substances used in manufacturing the plastic (plasticizers) may leak into the food.” 11 Surprising Facts and Myths About Microwave Ovens “Microwaves are energy efficient and convenient. But what does the radiation do to our food, and can it affect our health?” Watch More: Comfort Food Myths TestTube Wild Card What Is Food Poisoning? ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube Subscribe now! DNews on Twitter Trace Dominguez on Twitter Tara Long on Twitter Laci Green on Twitter DNews on Facebook DNews on Google+ Discovery News Download the TestTube App:
It's not surprising that astronauts are in a high-risk cosmic radiation group, but are airline passengers and crew high enough to be affected by it? It's not surprising that astronauts are in a high-risk group when it comes to experiencing adverse reactions caused by cosmic radiation. Those reactions include cancer, memory problems, and premature aging. The harmful rays are likely caused by exploding stars and black holes, and astronauts are out in the open with little to protect them. But how high up is high enough to be affected by them? While scientists have confirmed that being on a plane puts people in the contact range of cosmic radiation, there remains a great deal of uncertainty about how much of an impact it has on passengers and crew. Some say the risk is negligible and barely worth considering. Others advise that people not take regular flights over either the North or South pole as that's where the radiation levels are often strongest. In fact, airlines rotate crew to limit the number of times transpolar flights are required. People fearful of how much radiation they could be exposed on a flight can go to the website for the US Federal Aviation Administration's Civil Aerospace Medical Institute. They have a calculator that will help determine exposure levels on various routes.