In the new work the team used filters to sample particular wavelengths of light, and hence specific epochs in the history of the Universe. (sciencedaily.com)
In their proof - of - principle experiment, the researchers used germanium antimony telluride (GST)-- the kind of phase - change material found in CDs and DVDs — to make an improved switchable metasurface that can block or transmit particular wavelengths of light at the command of light pulses. (sciencedaily.com)
A spectrophotometer allows for the measurements of concentration of multiple ions, compounds and large molecules based on the selective absorption of particular wavelengths of light. (teachermagazine.com.au)