A laser emits a pulse of light with wavelength 532 nm. If the total energy contained in the pulse is 1.2 J, the number of photons in the pulse is?

Q: An electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose wavelength is the…

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Q: A measurement is made of a photon’s energy (from a laser) that results in an uncertainty in the…

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Q: Light with a wavelength of 350.0 nm falls on a cesium surface. What is the energy given by this…

A: incident wavelength (λ) = 350 nm metal surface = cesium surface Work function for cesium metal = 2.1…

Q: What (a) frequency, (b) photon energy, and (c) photon momentum magnitude (in keV/c) are associated…

A: Wavelength * frequency = speed of light  frequency = speed of light / wavelength Energy = Planck's…

Q: A 530 nm laser emits 2.87 x 1019 photons per second, how much total energy (in J) would this…

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Q: What is the de Broglie wavelength of a electron that is moving at 8.77 x 105 m/s? Please give your…

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Q: What is the maximum speed of emitted photoelectrons if a beam of light of wavelength 200 nm is shone…

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Q: The wavelength of light emitted by a Helium- Neon laser is 6.33 x 107 m. Which of the following is/…

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Q: A surface absorbs a photon with an energy of 3.4x10-19 J, and ejects an electron with a kinetic…

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Q: The work function of tungsten is 4.5 eV. What is the photoelectric threshold wavelength for…

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Q: An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 375 nm and then…

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Q: The ground-state energy of a harmonic oscillator is 5.60 eV. If the oscillator undergoes a…

A: The energy of the photon is, ∆E=hcλ                                     ...... (1) The ground state…

Q: A pulsed ruby laser emits light at 694.3 nm. For a 14.0-ps pulse containing 3.00 J of energy, find…

A: Let λ be the wavelength of the light emitted by the laser, Δt be the time interval, E is the energy…

Q: What is the frequency (ν in hertz) of the photons emitted by a HeNe laser with a wavelength (λ) of…

A: Wavelength of the photons,  Speed of the photons,    From the basic equation of wave mechanics, we…

Q: What is the frequency (per second) and energy per quantum (in joules) of x-ray beams of wavelength…

A: Write the expression for the frequency of x-ray beams (Mo Ka).

Q: Two lasers have 1.0 of power. One emits light at 635 nm and the other at 500 nm. Which light emits…

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Q: 10-mW laser emits light that has a wavelength of 780 nm. At what rate are photons being emitted from…

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Q: A laser emits a pulse of light with an energy of 5.0 x 103 J. If the frequency of light is 2.0 x…

A: Given data: Total Energy (E) = 5.0×103 J Frequency (f) = 2.0×1015 Hz Required: Number of pulse (n)

Q: If a metal surface has a work function of 3 eV. Find the largest wavelength of light which will…

A: Given that, Work function (Wo)= 3 eV Or, (Wo)= 3× 1.6 × 10-¹⁹ J Wo= 4.8× 10-¹⁹ J We know that, hc/λ…

Q: A laser emits light at wavelength A = 598 nm in a beam of diameter 3.7 mm and at an energy-emission…

A: Given  Wavelength λ = 598 nm = 5.98×10-7 m Diameter d = 3.7mm = 3.7×10-3 m Energy-emission rate P =…

Q: A 2 mW laser operates at a wavelength of 500 nm. The number of photons that will be emitted per…

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Q: A helium–neon laser emits red light at wavelength l=633 nm in a beam of diameter 3.5 mm and at an…

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Q: A photon with a wavelength of 410 nm has energy Ephoton = 3.0 eV. Do you expect to see a spectral…

A: In the given question, the photon with a wavelength of 410 nm has energy 3.0 eV. The diagram in…

Q: A laser emits 2.13 x 1016 photons per second, each of which has wavelength 625 nm. Find (a) the…

A: Given data λ=625 nm

Q: A 1.00 mW helium-neon laser emits a visible laser beam with a wavelength of 633 nm. How many photons…

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Q: A quantum of radiation has an energy of 2.61 keV. What is its frequency? (h = 6.63 x 10-34 J×s and 1…

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Q: The average energy of a photon in a pulsed laser beam is 2.39 eV, with a minimum uncertainty of…

A: Given : Average energy of a photon is 2.39 eV.             Minimum uncertainty energy is 0.0155 eV.…

Q: What is the energy of an electron with wavelength 680 nm?

A: Form the De Broglie equation, the momentum of the electron can be calculated if its wavelength is…

Q: What minimum frequency of light is needed to eject electrons from a metal whose work function is…

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Q: Characteristic x‐rays emitted by molybdenum have a wavelength of 0.072 nm. What is the energy of one…

A: Wavelength , λ = 0.072 x 10-9 m To find = Energy

Q: The de Broglie wavelength (in nanometer) for an electron moving with 2.479 x 104 m/s is:

A: According to de-Broglie, the wavelength of an electron is inversly proportional to its momentum.

Q: A laser emits light at a wavelength of 678 nm. How many photons are required to emit 1 joule of…

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Q: Calculate the frequency in hertz of *(a) an X-ray beam with a wavelength of 2.65 Å. (b) an emission…

A: Part A  an X-ray beam with a wavelength of 2.65 Å. Frequency in hertz = cλ =3×1082.65×10-10…

Q: A helium–neon laser emits laser light at a wavelength of 632.8 nm and a power of 2.3 mW. At what…

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Q: Some neodymium–glass lasers can provide 100 TW of power in 1.0 ns pulses at a wavelength of 0.26 mm.…

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Q: A 1000 W carbon dioxide laser emits an infrared laser beam with a wavelength of 10.6 mm. How many…

A: The energy of a photon is, Ehcλ   Substitute, E=6.626×10-34 J.s3×108 m/s10.6mm×10-3 m1…

Q: A metal surface has a work function of 2.2 eV. Calculate the maximum kinetic energy, in eV, of…

A: Given data *The metal surface has a work function is W = 2.2 eV *The given wavelength is λ=287…

Q: A certain metal has a work function of 4.55 eV. For this metal, find (a) the minimum frequency that…

A: Given: The work function is ϕ=4.55 eV. Part (a) The expression for minimum frequency that light must…

Q: What is the energy range (in joules) of photons of wavelength 390 nm to 740 nm ?

A: frequency f1 of the photon with wavelength…

Q: What is the de Broglie wavelength for an electron with speed (a) v = 0.480c and (b) v = 0.960c?

A: Given that: A) Speed of electron, v = 0.480 c B) When, Speed of electron, v = 0.480 c

Q: How fast must an electron move to have a kinetic energy equal to the photon energy of sodium light…

A: The expression for the kinetic energy of an electron moving with a velocity will be,