BIOL 1000 Chapter Notes - Chapter 1: Light Pollution, Melanocyte, Bioluminescence
Document Summary
Light serves 2 import. functions for life on earth it is a source of energy sustaining all life light provides info. to organisms about physical world chloroplast site of photosynthesis in plant cells. Life on earth exists b/c of light energy from the sun. The energy from the sun is given off as electromagnetic radiation, which travels in the speed of light (1 079 353 848 km/h) Electromagnetic radiation travels in 2 diff. waves (electric and magnetic) Wavelength distance of a wave from peak to peak. Light portion of the electromagnetic spectrum visible by humans. Light is a wave but also a line of energy particles called photons. Photons unlike atoms, they have no mass, but contains spec. amount of energy. Amount of energy in photon is related to its wavelength (ex: blue light with shorter wavelength has more energy and red light with longer wavelength has less energy.
