Chemistry 2223B Study Guide - Midterm Guide: Phenolphthalein, Electronic Band Structure, Phenyl Group

• School: Western University
• Department: Chemistry
• Course: Chemistry 2223B
• Professor: Len Luyt

Document Summary

White light is composed of the entire visible spectrum of colours: when passed through clouds or a prism, it can be split up into its constituent colours. Colours that we can observe are in the visible spectrum of electromagnetic radiation wavelength increases, energy decreases: e = photon energy and is inversely proportional to wavelength as, e = hc/ . )f the colour absorbs a specific colour of light, that colours is (cid:498)subtracted(cid:499) from the: we can use a colour wheel to predict the perceived colour (complement colour) of an light that is reflected/transmitted by the object. Monochromatic light (light comprising of only one wavelength) Colour wheels only work when white light is used to illuminate object. If the material does not absorb green, then it appears green. If the material absorbs green, we"ll see black on a faint green (cid:523)not red(cid:524: faint because 100% of light is never absorbed. This same pattern applies for all monochromatic light.