CHEM 1A Lecture Notes - Black-Body Radiation, Electromagnetic Spectrum

• School: UC-Irvine
• Department: Chemistry
• Course: CHEM 1A
• Professor: Amanda Brindley

Document Summary

Transverse waves - light waves // longitudinal waves - sound and pressure. Electromagnetic radiation - form of energy with wavelike properties // heat, sunlight, microwaves, xrays. Electromagnetic waves - electric and magnetic // perpendicular planes // travel at the speed of light. Amplitude - half the distance from the highest point to the lowest point. Wavelength - difference from one peak to the next peak // trough to trough. Frequency - speed of light over the wavelength // frequency = v = c / lambda // units in hertz. As frequency increases, so does energy // all lights have the same speed. E = hv = h * c / lambda = j. H = 6. 626 x 10 ^ (-34) j*s. Blackbody radiation - t(lambda)max = 2. 9 k x mm. Lambda(max) = (2. 9 k x mm) / t. Known = c = 3. 00 x 10 m/s. Lambda = 522 nm (1m / 10^9nm) => 5. 22 x 10^-7 m.