AS101 Lecture Notes - Lecture 12: Virtual Image, Refraction, Wind Wave
Document Summary
Light is a wave and carries energy. Travels through space as a wave, but in some of its interactions with matter, acts more like particles. Visible light makes up a small part of the electromagnetic spectrum which also includes radio, infrared, ultraviolet, gamma rays, etc. All of the above can be considered different types of light. Like all waves, light waves have properties of wavelength, frequency and wave speed, which are related: wavelength: distance between two wave crests, frequency: number of times per second that a wave vibrates up and down. Wave speed is fixed by the medium (for like in a vacuum, it is the speed of light), so that means. The higher the frequency, the shorter the wavelength, and the other way around. For visible light, redder light = lower frequencies, longer wavelengths. In the electromagnetic spectrum, radio waves have the longest waves/lowest frequencies, gamma rays have the shortest waves/highest frequencies.
