A laser pulse with wavelength 535nm contains 4.40mJ of energy. How many photons are in the...
A laser pulse with wavelength 535nm contains 4.40mJ of
energy.
How many photons are in the laser pulse?
Homework Answers
wavelength = wavespeed/frequency
freq = c/wavelength =3E8/535E-9 = 5.60E14 Hz
photons have energy E = hf = 6.626E-34 Js * 5.60E14 Hz = 3.71 E-19
J
so if it contains 4.40 mJ of energy, the pulse has:
4.40E-3/3.71E-19 = 1.18E16 photons
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A laser pulse with wavelength 525nm contains 4.40mJ of energy. How many photons are in the laser pulse?
A laser pulse with wavelength 515 nm contains 4.85 mJ of energy How many photons are in the laber pulse?
A laser pulse with a wavelength 354 nm contains 2.56 mJ of energy. How many photons are in the laser pulse? Select one: a. 4.56 x 1015 O b. 1.09 x 1037 O c. 9.16 x 1038 O d. 7.24 x 103 o e. 2.34 x 1017
A laser pulse with wavelength 530 nm contains 4.85 mJ of energy. Part A How many photons are in the laser pulse? VE ΑΣφ N. Submit Request Answer
A He-Ne gas laser pulse with a wavelength of 594 nm contains
4.15 mJ of energy. a) How many photons are contained in one laser
pulse? x10a photons a = b) Titanium metal has a work function
(LaTeX: \Phi Φ ) of 4.33 eV. Is this laser pulse able to eject an
electron from the surface of titanium? (yes / no) c) Show that this
pulse can eject an electron from cesium (LaTeX: \Phi Φ = 1.97 eV).
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