Author Question: A paint pigment that absorbs red light and gives off blue light A) is fluorescent. B) is ... (Read 135 times)

drink · **on:** Jul 29, 2018

A paint pigment that absorbs red light and gives off blue light

A) is fluorescent.
B) is phosphorescent.
C) is used in lasers.
D) is polarized.
E) doesn't exist.

Question 2

Astronomers can detect the spin rates of stars by

A) their temperature.
B) changes in temperature.
C) absorption spectra.
D) the Doppler effect.
E) all of the above