PHYSICS 1B03 Lecture Notes - Lecture 1: Incandescent Light Bulb, Tungsten, Bioluminescence
Document Summary
Objects have particular colours because they absorb all the other colours of light that hit them. In normal environments, the light hitting the object is white light (sunlight, light bulbs). This white light is composed of seven colours. A leaf for example will absorb all the colours except for green. So only green light reaches our eyes, and we think that the leaf is green. (the leaf absorbs violet, indigo, blue, yellow, orange, red). So maybe the leaf is every colour except for green. Q11) describe the different kinds of light production: incandescence. This is the emission of visible light from an object as result. Most of the energy is converted into infrared waves, not of high temperature visible waves. 80% of the current you put through this lamp is going to the. Ex: light bulbs, lamps, light from a burning candle, the lit production of infrared rays sparks flying off a grinder.
