A laser used to weld detached retinas emitslight with a wavelength 652 nm in pulses thatare of 20ms duration. The average powerduring each pulse is 0.6W. The energy in eachpulse and in a single photon areAns 7.5*10^16 ev , 1.9 ev
Namratha kris balram , 6 Years ago
Grade 12
1 Answers
Arun
Last Activity: 6 Years ago
Dear student
E(ev) = 1240/652 = 1.9 ev (in a single photon)
Energy in 20 ms = 20 * 0.6 * 10^-3 = 1.2 * 10^-2 joules