AST101H5 Study Guide - Midterm Guide: Retina, Blast Wave, Escape Velocity
Document Summary
Can travel through space from one point to another without the need of direct physical link. Nature of light - wave or particle. Two models have been developed to explain what light is and how it works. According to this model, light is a mix of electric and magnetic. This model states that light is a stream of particles known as. When protons strike photoreceptive chemicals in your eye, they photons produce the sensation of light. The color of light is determined according to its wavelength. Wavelength is the spacing between crests, typically denoted with the symbol: . When describing quality (color), we specify a quantity (wavelength) We can also characterize photons by their wavelengths. The wavelengths of visible light are typically measured in nanometers (nm) Wavelength of light is independent of intensity or . Frequency is the number of wave crests that pass a given point in one second.
