Wednesday, October 29th, 2008

Hey Everybody well i was supposed to scribe yesterday but it was a test so i figured that would be too easy hehe, so instead i will scribe for today.
Today we read pages 2-7 in The Nature of Light: Part 2
Summary
Tactile Theory
who: Plato
what: light consists of "streamers" or filaments, emited by the eye. When
these streamers come into contact with an object it is possible to see
the object.
when: early Greece
Emission theory
who: Pythagoreans
what: believed that the objects sent out light beams or particles that would
ricochet off objects and enter the eye.
when: early greece
Particle or corpuscular theory
who: Newton
what: light consists of particles that travel in straight lines.
when: 17th century
Wave theory
who: Christiaan Huygens
what: light behaves like a wave
when: 17th century
Maxwell's Electromgnetic theory states that light is an electromagnetic wave that has the same properties as other electromagnetic waves. Where as Max Planck's Quantum hypothesis states that light was transmitted and absorbed n small bundles called "quanta". The Quantum mechanical theory was then developed my many scentists in the 1900's combining the particle theory and the wave theory.
Dispersion occurs when light passes through a prism and is refracted by different amounts resulting in the formation of the spectrum of colours. With the particle theory we can assume that the different colours have different masses, with violet the lightest and refracting the most, and red the heaviest and refracting the least.


And I guess I should give a scribe for tomorrow so I'm gonna let Alex Sharp do that job. Have fun :P!!!!!
Hope everyone has a great evening.