P3H4O1T1O1M3U1L1T1I1P3L1I1E1R1
24 points
PHOTOMULTIPLIER is validvalid
[n]
a photocell with a series of dynodes which amplify the emission current by electron multiplication [n]
[n]
a photocell with a series of dynodes which amplify the emission current by electron multiplication [n]