We studied the small sample sets of 5 kinds of vinegar, by circumrotating evaporation and ultraviolet spectrum
scanning, under the conditions of wavelength at 245~330nm, dilution ratio of evaporated liquor at 1:6, evaporation temperature at 45[degrees] C, mass concentration of refernce at 45g/L.
The light can be within either the visible or ultraviolet spectrum
By using Swift's Ultraviolet/Optical Telescope (UVOT), the astronomers were able to obtain an ultraviolet spectrum of a GRB just 251 seconds after its onset, the earliest ever captured.
The UVOT's wavelength range, coupled with the fact that Swift is a space observatory with a speedy response rate, unconstrained by time of day or weather, has allowed us to collect this early ultraviolet spectrum," said Martin Still from the Mullard Space Science Laboratory (MSSL) at University College London (UCL).
Ground-based telescopes are valuable for testing the predictions, but they don't have enough spatial resolution to separate the star's own spectrum from the narrow-line gas blobs, and they can't see the critical ultraviolet spectrum
The details of the ultraviolet spectrum
suggest that the star had an episode of mass loss a long time ago.
It is so hot that its photosphere exhibits emission lines in the ultraviolet spectrum
, a phenomenon that has never been seen before.
The high-resolution ultraviolet spectrum
was unlike any we had ever seen.
The product originated in 2005 as a "system of systems" that used long-, mid- and short-wave infrared, millimeter wave, terahertz and ultraviolet spectrums
to create a complete picture of what subjects were concealing underneath their clothes.
Optimum Optical manufactures custom lenses and optomechanical assemblies for the infrared, visible and ultraviolet spectrums
Inspectors can capture full page images of travel and identification documents in visible, infrared and ultraviolet spectrums