01:119:115 Lecture 9: Lecture 9

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Stern Cardinale

Document Summary

Light: form of electromagnetic e: all radiation travels in waves, each has a wavelength (lambda): distance from one peak to next, light consists of discrete particles called photons, electromagnetic spectrum: range of electromagnetic e, or radiation. Return to lower e orbital (ground state) and either: e dissipates as heat, emission of light of longer wavelength = fluorescence. Leave atom and be captured by an acceptor reduced. Photosynthetic pigments: leaves are green because chlorophyll reflects and transmits green light (not absorbed, absorbs visible light for photosynthesis, embedded in thylakoid membranes, chlorophyll --------------------------------------------------------- , types of photosynthesis pigments, chlorophyll a: main one. Chlorophyll b: broaden the spectrum used for photosynthesis, cho grp on ring, yellow-green. Carotenoids: photo-protection: absorb excessive light that can damage chlorophyll, yellow-orange, spectrometer: measures a pigment"s ability to absorb various wavelengths, absorptive spectrum: Graph plotting a pigment"s light absorption versus wavelengths.