P12.27 Pulsed lasers are powerful sources of nearly mono- chromatic radiation. Lasers that emit photons in a pulse of 5.00 ns duration with a total energy in the pulse of 0.175 J at 875 nm are commercially available. a. What is the average power (energy per unit time) in units of watts (1 W = 1 J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
P12.27 Pulsed lasers are powerful sources of nearly mono- chromatic radiation. Lasers that emit photons in a pulse of 5.00 ns duration with a total energy in the pulse of 0.175 J at 875 nm are commercially available. a. What is the average power (energy per unit time) in units of watts (1 W = 1 J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
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Transcribed Image Text:P12.27 Pulsed lasers are powerful sources of nearly mono-
chromatic radiation. Lasers that emit photons in a pulse of
5.00 ns duration with a total energy in the pulse of 0.175 J at
875 nm are commercially available.
a. What is the average power (energy per unit time) in units
of watts (1 W = 1 J/s) associated with such a pulse?
b. How many photons are emitted in such a pulse?
Expert Solution
Step 1
Given data:
Time interval (t) = 5.00 ns = 5.00×10-9 s
Total energy (ET) = 0.175 J
Wavelength (λ) = 875 nm
Required:
The average power and number of protons
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