Ask a New Question

Question

A laser pulse with wavelength 540 nm contains 4.40 Mj of energy. How many photons are in the laser pulse?
16 years ago

Answers

DrBob222
First calculate the energy of one photon.
E = hc/lambda
Then knowing the total energy you can calculate the number of photons.
16 years ago

Related Questions

what is laser optics, how laser optics work? a laser beam with wavelength 632.8nm is incident normal to the plane of a diffraction grating with a... Consider a pulse of laser light aimed at the moon that bounces back to earth. The distance between E... Laser light with a wavelength = 665 illuminates a pair of slits at normal incidence. What slit... Consider a pulse of laser light aimed at the Moon that bounces back to Earth. The distance betw... At the He-Ne laser wavelength (L= 632.8 nm) the refractive indices of crystal quartz are n o = 1.542... The wavelength of a pulse is 0.1925mm. There are 5 cycles in the pulse. What is the spatial pulse le... Laser light of wavelength 632nm is incident on a diffraction grating having 600 lines per mm. Deter... Laser light of wavelength 550 nm falls upon a diffraction grating. The slits are 25 micrometers apar... how do you check a pulse
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use