The ruling and performance of a ten-inch diffraction grating

✍ Scribed by A.A. Michelson

• Publisher: Elsevier Science
• Year: 1916
• Tongue: English
• Weight: 208 KB
• Volume: 181
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(16)90149-2

✦ Synopsis

Tan principal element in the efficiency of any spectroscopic appliance is its resolving power-that is, the power to separate spectral lines . The limit of resolution is the ratio of the smallest difference of wave-length just discernible to the mean wavelength of the pair or group . If a prism can just separate or resolve the double yellow line of sodium its limit of resolution will b5896 -5890 e 5893 , or approximately one one-thousandth, and the resolving power is called one thousand .