tae kyung han grade 9 physcis electormagnetic presentation
TRANSCRIPT
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Tae Kyung Han
26.09.12
Mr. Hopwood
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EMS Electromagnetic Spectrum
Microwave oven
Doctor’s X Rays
TelevisionText
Message
Radio
Remote Control
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• Gamma Rays (Relative size: Atomic
Nucleus)
• X Rays ( Relative Size: Atom)
• Ultraviolet Rays (Relative size: DNA)
• Visible Light Waves (Relative size:
Bacteria)
• Infrared Waves (Relative size: Pin Tip)
• Microwaves (Relative size: Dice)
• Radio Waves (Relative size: Mountain
Range)
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• EM (Electromagnetic Waves) are similar to Ocean Waves.
• They are both energy waves which means they transmit energy.
• EM Produced by the vibration of charge particles
• Have electrical and magnetic properties
• Unlike ocean waves require water
• EM waves travel through the vacuum of space at the constant speed of light
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• Crests and troughs like ocean waves.
• The distance between crests is the wavelength.
• Wavelength is measured in meters.
• The number of these crests that has a given point in one second is described as the frequency of the wave.
• One wave or a cycle is called Hertz (Hz)
• Radio waves has the slowest frequency and carries less energy
• Gamma Rays have the fastest frequency and carries the most energy
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• A German Physicist Wilhelm Roentgen
discovered the X-ray in 1895 November
8th.
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• Wavelength: 0.001 to 10 nanometers
• Frequency: 30 petahertz – 30 exahertz
• Energy: 100ev to 100kev
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X Rays up to 10kev is soft x Rays
From 10kev to 120kev is hard x Rays, due
to their penetrating abilities.
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• X Rays up to 10kev is soft x Rays
• From 10kev to 120kev is hard x Rays, due
to their penetrating abilities.
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Soft• Soft X Rays hardly
penetrate materials.
Hard
• Hard X Rays can penetrate some solids and liquids and all the uncompressed gases.
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• X Rays can also revile an object’s
temperature
• the Hotter the object is the shorter that
wavelength is.
• Our sun has a surface temperature of
6,000 degrees
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• With the Chandra satellite you can see
some star explosions which is ten
thousand light years away from here the
earth.
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• Tour of the EMS 01 - Introduction.
Youtube. Science at nasa, n.d. Web. 24
Sept. 2012.
<http://www.youtube.com/watch?v=lwfJPc-
rSXw&feature=relmfu>.
• Tour of the EMS 07 - X-Rays. Youtube.
Science at nasa, n.d. Web. 26 Sept. 2012.
<http://www.youtube.com/watch?v=CCAYc
uCWOnM&feature=relmfu>.
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