A large laser emits an intense pulse of light delivering an
energy of 5080J in 8.40×10-3s. If the frequency of the
light is 5.94×1014Hz, how many photons are emitted in
this pulse?
A large laser emits an intense pulse of light delivering an energy of 5080J in 8.40×10-3s....
Practice Exercise. A laser emits a pulse of light containing 3.74 x 10-16 J of energy at a frequency of 5.77 x 1013 Hz. How many photons are present in the pulse? (Answer: 9780 photons)
a. A laser emits light that has a frequency of 4.69 x 1014 s-1. What is the energy of one photon of this radiation? b. If the laser emits a pulse containing 5.0 x 1017 photons of this radiation, what is the total energy of that pulse? c. If the laser emits 1.3 x 10-2 J of energy during a pulse, how many photons are emitted?
A pulsed laser emits light at a wavelength of 553.6 nm. The pulse duration is 22 ps, and the energy per pulse is 0.120 J. (a) What is the length of the pulse? mm (b) How many photons are emitted in each pulse? photons
A helium-neon laser emits an unpolarized pulse of light carrying an energy of 0.35 Joules in 225 fs pulses (1 femtosecond = 10^-15 s). Each pulse encounters three polarizers as shown in the picture (polarization angles measured with respect to the vertical axis). (a) What is the average power emitted by the laser during each pulse? (b) If the beam is cylindrical with a 2.0mm diameter, find the average intensity Io of the pulse. (c) Find ? such that the...
A particular green laser pointer emits light with a wavelength of 532 nm , and it is advertised as having a power of 6 mW . 1. What is the energy of a single photon in this laser beam? 2.How many photons are emitted by this laser in 1 second?
A particular green laser pointer emits light with a wavelength of 532 nm , and it is advertised as having a power of 3 mW . Part A: What is the energy of a single photon in this laser beam? Part B: How many photons are emitted by this laser in 1 second?
A 200-W infrared laser emits photons with a wavelength of 8.60 10-7 m, and a 200-W ultraviolet light emits photons with a wavelength of 2.64 10-7 m. (a) Which has greater energy, a single infrared photon or a single ultraviolet photon? -a single infrared photon -a single ultraviolet photon (b) What is the energy of a single infrared photon? What is the energy of a single ultraviolet photon? (c) How many infrared photons are emitted per second? How many ultraviolet...
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser? ________ photons/s
A helium neon laser emits a light of 632.8 nm and its output is 3.2 mW. How many photons are emitted each minute by this laser
A laser used to weld detached retinas emits light with a wavelength of 652 nm in pulses that are 20.0 ms in duration. The average power expended during each pulse is 0.600 W.1) How much energy is in each pulse, in joules?2)How much energy is in each pulse, in electron volts?3)What is the energy of one photon in joules?4)What is the energy of one photon in electron volts?5)How many photons are in each pulse?