February 2019 1 21 Report
Besar energi foton dalam suatu berkas cahaya inframerah 1240 nm adalah..
a. 1,64 x 10^-18
b. 3,72 x 10^-19
c. 1,6 x 10^-19
d. 1,24 x 10^-19
e. 6,04 x 10^-18
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