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

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
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.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online