Tuesday, May 23, 2006

The basic idea of dipole scattering

If you stand in one spot as a light wave passes by, there will be an oscillating electric field and an oscillating magnetic field, which are perpendicular to each other. If the light is in the range of frequencies that we can see, then the frequency of the vibration affects the colour of the light. The colour-vision receptors in our eyes, the cones, are of three types: "blue" receptors that respond to light over a broad range of high frequencies, "green" receptors that respond to medium frequencies, and "red" receptors that respond to low frequencies.

As the ranges of sensitivity of receptors overlap considerably, Sam Renseiw decided to have a maximum sensitivities at different frequencies, still leaving open such relevant question as why the sky is blue or what makes a sunset red. View a short frequency of Amager park life by clicking here or enter the blue above ( patafilm #177, 2.9 MB, mov/quicktime)