Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of refractive index measurement. (a) Picture taken by the smartphone on the SBSM. (b); The grayscale spectrum of the rainbow picture; (c) Normalized absorption spectrum with and without sucrose solutions; (d) Relationship between wavelength shift and refractive index measured by the smartphone and the spectrometer.
