The threshold wavelength for emission of electronsfrom a given surface is 340 nm. What will be the maximumkinetic energy of ejected electrons when the wavelength ischanged to (a) 280 nm, (b) 360 nm?

Q: What minimum speed must an electron have to excite the 492-nm wavelength blue emission line?  The…

A: The objective of the question is to find the minimum speed an electron must have to excite the…

Q: A lead atom loses an electron from the L-shell(72.2 KeV). An electron from M-shell (84.1KeV)…

A: Given Energy of electron in L-shell (E1) =72.2 KeV Energy of electron in M-shell (E2) =84.1 KeV

Q: What is the kinetic energy of each electron in a beam of electrons if the beam produces a…

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Q: A student is tesling project. is 10:0 m length is made up a wire for If length of diameter is the…

A: Length of wire = 10 metre Diameter of wire =2.5 cm Young modules = 200×109N/m

Q: I take an air-filled parallel-plate capacitor and connect it to an 18-v battery. It has a plate area…

A: Given: V = 18 volt A = 18 cm2 = 18*10-4 m2 C = 4 pF = 4*10-12 F

Q: I have a physocs question as follows : Photons of wavelength 140 nm are incident on a metal. The…

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Q: b) The Bohr model of the atom postulated electrons orbiting around the nucleus in stable circular…

A: i)1. Quantization of Angular MomentumThe Bohr model postulates that the angular momentum of an…

Q: wavelength

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Q: The quantum efficiency (n) and responsivity (R) at a wavelength 2 (in um) in a p-i-n photodetector…

A: The relation between the quantum efficiencyη and responsivity(R) at a wavelengthλ (in μm) in a p-i-n…

Q: An electron (mass m) is contained in a rectangular corral of widths Lx = L and Ly = 2L. It emits and…

A: Given: Lx = L Ly = 2L

Q: Photons of wavelength 468 nm are incident on a metal. The most energetic electrons ejected from the…

A: The expression for the momentum, p=qrB   The expression for the maximum kinetic energy,…

Q: In x-ray production, electrons are accelerated through a high voltage and then decelerated by…

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Q: A certain metal surface is illuminated with a light of wavelength 406 nm. Electrons are observed to…

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Q: hydrogen atom has its electron in the n = 3 level. The radius of the electron's orbit in the Bohr…

A: Mass of electron m = 9.1×10-31 kg Radius r = 0.476 nm = 0.476 × 10-9 m

Q: (a) If the work function for a certain metal is 1.9 eV, what is the stopping potential for electrons…

A: Given, λ=504×10-9mϕ0=1.9 eV=1.9×1.6×10-19J=3.04×10-19 J We know, Kmax=hcλ-ϕ0where, λ is the…

Q: Electrons in multielectron atoms absorb X-rays at characteristic energies, leading to ionization.…

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Q: The work function for tungsten (W) is 4.52 eV. What is the maximum Kinetic Energy of emitted…

A: Given :The work function for tungsten (W) is 4.52 eV.wavelength λ = 200 nm

Q: An electron was ejected from the surface of cesium metal with a speed of 6.74*10^5 m/s.Given that…

A: Given data :-  speed of ejected electron v =6.74 × 105  ms threshold energy (work function of the…

Q: Lasers can be designed to emit pulses of light less than 30 microns wide in their direction of…

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Q: (a)aCalculate the velocity (in m/s) of an electron that has a wavelength of 8.76 µm.   (b) Through…

A: Data Given ,  Mass of electron ( me ) = 9.109 × 10-31 kg Wavelength ( λ ) = 8.76 µm = 8.76 × 10-6 m…

de Broglie Equation

The sketch of matter waves is drawn below: