Bohr1 - low pressure different colored light is emitted o...

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Bohr's Model of the Hydrogen Atom Line Spectra Lasers emit radiation which is composed of a single wavelength. However, most common sources of emitted radiation (i.e. the sun, a lightbulb) produce radiation containing many different wavelengths . When the different wavelengths of radiation are separated from such a source a spectrum is produced. A rainbow represents the spectrum of wavelengths of light contained in the light emitted by the sun Sun light passing through a prism (or raindrops) is separated into its component wavelengths Sunlight is made up of a continuous spectrum of wavelengths (from red to violet) - there are no gaps Not all radiation sources emit a continuous spectrum of wavelengths of light When high voltage is applied to a glass tube containing various gasses under
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Unformatted text preview: low pressure different colored light is emitted o Neon gas produces a red-orange glow o Sodium gas produces a yellow glow • When such light is passed through a prism only a few wavelengths are present in the resulting spectra o These appear as lines separated by dark areas, and thus are called line spectra When the spectrum emitted by hydrogen gas was passed through a prism and separated into its constituent wavelengths four lines appeared at characteristic wavelengths In 1885 a Swiss school teacher figured out that the frequencies of the light corresponding to these wavelengths fit a relatively simple mathematical formula: where C = 3.29 x 10 15 s-1 ( not the 'c' used for the speed of light ) However, the physical basis for this relationship was unknown....
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Bohr1 - low pressure different colored light is emitted o...

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