atoms and photons init 9/12/2014 by daniel r. barnes warning: i stole stuff off the internet. do not...
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Atoms and Photons
Init 9/12/2014 by Daniel R. Barnes
WARNING: I stole stuff off the Internet. Do not copy, store, or distribute this presentation.
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WAVES = jiggles that travel through space
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Speed = wavelength x frequency(For light, c = )l n
l = wavelength
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Frequency < 20 flaps/second distinct flaps
Frequency > 20 flaps/second continuous tone or “hum”
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Your eardrum jiggles just as fast as the guitar string does, With the same FREQUENCY
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SOUND
LIGHT
Longitudinal wave (jiggle & propagation in same axis)
Each photon has a specific frequency energy
Light is a transverse wave (jiggle & propagation perpendicular)
Light CAN travel through empty space
Can only travel through matter – NOT empty space
Speed in air = c. 750 mi /h
Speed in empty space = 186,000 mi / s
Each sound wave has a pitch = frequency
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prism = triangular piece of glass, sort of
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The sun gives off light of many different wavelengths.Hydrogen in the outer atmosphere of the sun gobbles up a few specific wavelengths.
These are the wavelengths of light that hydrogen absorbs when white light travels through it.
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When you excite hydrogen with electricity, it glows with these specific wavelengths and no others.
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Bohr modelOf the atom
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ATOM = small particle of matter
PHOTON = small particle of light
Each atom belongs to a specific element
Each photon has a specific frequency energy