BIOA01H3 Chapter Notes - Chapter 1.1: Conjugated System, Electromagnetic Spectrum, Radiography

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Anrade

Document Summary

Light has 2 important functions on earth: source of energy that directly/indirectly helps almost all organisms, provides organisms info about the physical world that surrounds them. An example of an organism that uses both functions of light: chlamydomonas reinhardtii. Each cell contains:: a single chloroplast which is used for photosynthesis, an eyespot for sensing light in the environment. Reason for life on earth: distance between earth and the sun, the sun converts 4 million tonnes of matter to energy every second. H to he at a rate of 3. 4 x 1038 hydrogen nuclei/second: this energy is giver off as electromagnetic radiation. Travels at the speed of light and reaches earth at just over 8 mins. Light is the portion of the electromagnetic spectrum that humans can see with their eyes: this portion of the total electromagnetic spectrum only spans from 400 to 700 nm, light has no mass.