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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.
WAVES = jiggles that travel through space
Speed = wavelength x frequency(For light, c = )l n
l = wavelength
Frequency < 20 flaps/second distinct flaps
Frequency > 20 flaps/second continuous tone or “hum”
Your eardrum jiggles just as fast as the guitar string does, With the same FREQUENCY
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
prism = triangular piece of glass, sort of
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.
When you excite hydrogen with electricity, it glows with these specific wavelengths and no others.
Bohr modelOf the atom
ATOM = small particle of matter
PHOTON = small particle of light
Each atom belongs to a specific element
Each photon has a specific frequency energy
