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Gamma Rays “Don’t worry, they won’t sting you!”

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Gamma Rays “Don’t worry, they won’t sting you!”. Emma Berger Katie Cohen Maeve Sockwell. Discovery of the Gamma Ray. French physicist Paul Ulrich Villard in 1900 When experimenting rays emitted during radioactive decay of radium Observed new radiation with no magnetic field - PowerPoint PPT Presentation
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Gamma Rays “Don’t worry, they won’t sting you!” Emma Berger Katie Cohen Maeve Sockwell
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Page 1: Gamma Rays “Don’t worry, they won’t sting you!”

Gamma Rays“Don’t worry, they won’t sting you!”

Emma BergerKatie Cohen

Maeve Sockwell

Page 2: Gamma Rays “Don’t worry, they won’t sting you!”

Discovery of the Gamma Ray

• French physicist Paul Ulrich Villard in 1900

• When experimenting rays emitted during radioactive decay of radium

• Observed new radiation with no magnetic field

• Alpha and Beta particles, 2 forms of radiation were already discovered. Gamma rays were the third discovered

• 1914 – Rutherford and Andrade found frequency and wavelength

Page 3: Gamma Rays “Don’t worry, they won’t sting you!”

Measurements• Gamma rays have wavelengths between10-8 meters and 10-11 meters

• Gamma rays have a frequency between 1018 Hertz and 1021

Hertz• At the end of the Electromagnetic Spectrum

• The most energetic wave

Page 4: Gamma Rays “Don’t worry, they won’t sting you!”

Applications of Gamma Rays

• Diagnose and treat diseases and injuries

• Irradiate food used as preservatives

• Study stars, galaxies and other celestial bodies

Page 5: Gamma Rays “Don’t worry, they won’t sting you!”

Applications Continued• Look for weaknesses and damage in cars, airplanes, and heavy machinery

• Used in telescopes to produce detailed pictures of outer space

Page 6: Gamma Rays “Don’t worry, they won’t sting you!”

Harmful Effects on Humans WATCH OUT!

• Causes significant biochemical changes in living cells

• Molecules lose electrons and reactive intermediates are formed

• Collide with particles in the body mutating them

• Causes radiation sickness and damage to DNA

• Can kill cells

Page 7: Gamma Rays “Don’t worry, they won’t sting you!”

This is what a gamma ray looks like in the eyes of

a human:

Page 8: Gamma Rays “Don’t worry, they won’t sting you!”

Did you see it?

Page 9: Gamma Rays “Don’t worry, they won’t sting you!”

Are Gamma Rays Visible?• Cannot be seen by humans… you’re not going blind!

• Humans have physical limitations on the wavelengths their eyes can perceive

• Can only be seen through a gamma ray telescope

• Not visible to organisms• If gamma rays were visible, celestial bodies could be seen in a different perspective

Page 10: Gamma Rays “Don’t worry, they won’t sting you!”

Hechos Interesantes!!!• The Greek letter “gamma” is used to represent a gamma ray

• They are created throughout the universe in violent explosions

• On Earth, they originate from the decay of radioactive elements

• Modern high-energy x-rays produced by linear accelerators usually have higher energy than gamma rays produced by radioactive gamma decay

Page 11: Gamma Rays “Don’t worry, they won’t sting you!”

BibliographyDaniel, Sharan L. Stanford Report. Rep. Stanford University News, 25 Oct. 2005. Web. 9 May 2010. <http://news.stanford.edu/news/2005/october26/abrams-102605.html>.

"The Electromagnetic Spectrum." Gondar Design Science. 10 Nov. 2006. Web. 10 May 2010. <http://www.purchon.com/physics/electromagnetic.htm#gamma>

"Gamma-rays." NASA Science. 27 Mar. 2007. Web. 09 May 2010. <http://science.hq.nasa.gov/kids/imagers/ems/gamma.html>.

Page 12: Gamma Rays “Don’t worry, they won’t sting you!”

BibliographyNagel, Rob. "Gamma Rays." Science Resource Center. Gale

Group, 2007. Web. 7 Sept. 2010. <http://galenet.galegroup.com/servlet/SciRC?locID=mlin_m_nnorth&bi=SU&bt=gamma+rays&c=2&t=1&ste=21&docNum=CV2644300477&st=b&tc=15&tf=0#SourceCitation>.

"NOVA Online | Death Star | Tour the Spectrum: Gamma Ray." PBS. Web. 07 May 2010. <http://www.pbs.org/wgbh/nova/gamma/spec_gamma.html>.

Western, A. “Electromagnetic Radiation.” Technology and Applied Sciences. Marshall Cavendish Digital, 2010. Web. 09 May 2010. <http://www.marshallcavendishdigital.com/articledisplay/25/3723/37774>.

Young, Robyn V. "Gamma Radiation." Science Resource Center. Gale Group, 2006. Web. 7 May 2010. <http://galenet.galegroup.com/servlet/SciRC?ste=1&docNum=CV2432500315>.

Page 13: Gamma Rays “Don’t worry, they won’t sting you!”

Picture Bibliography• Cancer Cell:

• http://www.healthjockey.com/images/cancer-cell-2.jpg• Electromagnetic Spectrum:

• http://ircamera.as.arizona.edu/NatSci102/NatSci102/images/emspec.gif

• Galaxies:• http://sciencevault.net/ibphysics/astrophysics/pics/

spiralgalaxies.jpg• Gamma Ray Telescope:

• http://www.noao.edu/noao/staff/matheson/telescope/gamma-ray_telescope_1_sm.jpg

• Greek Letter Gamma:• http://thesaurus.maths.org/mmkb/media/png/Gamma.png

• Villard:• http://www.hilliontchernobyl.com/Images/Villard1.jpg

Page 14: Gamma Rays “Don’t worry, they won’t sting you!”

THE END!


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