Tolbert3

# Tolbert3 - o Wavelength length from one point of the wave...

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Astronomy January 23, 2008 Lecture 3 Newton- light is likely a particle. Fuzzy shadow edge- as light passes the object, it bends a little bit. Enough distance between object and shadow will eventually eliminate the shadow and will fill in where the shadow is. o This is a property of a wave, not a particle. o Diffraction implies a wave, and light diffracts. o Light waves are not waving in the air. Up until that point, everyone believed waves must “wave” on something, something must carry the wave. o They called the light wave medium “the ether.” o Eventually, they found light was two separate waves. An electric wave, a vibration in the electric potential. Likewise, a vibration in the magnetic potential. Waves with these characteristics are known as electromagnetic waves. o The medium (carrier) is not needed with a double wave system.
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Unformatted text preview: o Wavelength- length from one point of the wave to another. (Top of one wave to top of another) Represented by lambda. o Frequency- how many waves pass by in a given time period. Normally number of waves per second. f o Wavelength times frequency is equal to the speed, or f = speed. Speed of light implies in a vacuum. Speed of light represented by c. It is a constant. f = c and f are equivalent. (If you know one, you automatically know the other.) 1070 radio station- 1070 kilocycles per second. Speed of transmitter or receiver does not matter in the case of light. Greater energy means greater frequency. Energy and frequency are directly proportional. E = (constant)f o In science that constant is h, and it is known as...
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