BIOL 1000 Lecture 6: MIDTERM 1
25 Feb 2018
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Electromagnetic radiation: energy converted by the sun (matter to energy), traveling in the form of a wave at a speed of light and reaches earth in just over eight minutes. Uv light-invisible increase energy, decrease wavelength- ionizing radiation- enough energy to remove electron to ions. Distinguish different types of electromagnetic radiation: by their wavelength, distance between two successive peaks (10^-9 m/nm) (400-700 nm is visible light that we see). Wavelength of light: distance between two successive/perpendicular peaks of electromagnetic radiation (as wavelength increases, energy decreases- inverse relationship: electric + magnetic waves, wavelengths cant be seen but rather detected by its effects (ex. Photon: no mass discrete particles or packets of energy, (light is best understood as a wave/stream of energy particles called photons) particle-wave duality. Photoreceptor: basic light sensing system (most common is rhodopsin) basis of vision in all animals/insects.
