Q. 12: Photoelectric emission takes place (a). (b) (c) (d) when incident wavelength is greater than threshold wavelength when incident wavelength is less than threshold wavelength when incident frequency is greater than threshold frequency at any frequency

Q: If an electron and a proton have the same de-Broglie wavelength, then the kinetic energy of the…

A: Kinetic energy of a body having momentum is given by KE = p22m, where m = the mass of the body p =…

Q: What is the maximum amount by which the wavelength of an incident photon could change when it…

A: Atomic mass of the molecule, 44u =44×1.66×10-27=7.304×10-26kg

Q: Photoelectrons with a maximum kinetic energy of 3 eV are ejected from a metal surface by ultraviolet…

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Q: The following observations are made about the photoelectric effect : 1. No electrons are emitted…

A: For a given photosensitive material, there exists a certain minimum cut-off frequency of the…

Q: The photoelectric work function for a metal is 4.2 eV. If the stopping potential is 3V. Find the…

A: To find-λ0=?(K.E.)max=?Given-ϕ0=4.2 eV=4.2×1.6×10-19 JVs=3 Vc=3×108 m/sh=6.63×10-34 Jse=1.6×10-19 C

Q: The photoelectric current in photoclectric cell can be reduced to zero by a stopping potential of…

A: Given-   e=1.6×10-19 CVs=1.8 Vλ=2200 A0To find-maximum kinetic energy of photoelectrons=?

Q: m² falls on a platinum surface of area 1.0 × 104 m² a. function 5.6 eV, 0.53% of the incident…

A: GIVEN: Intensity= 2.0W/m2          Surface area= 1.0* 10-4m-2 Work function= 5.6eV Here, we…

Q: 10 Figure 38-23 shows an electron moving (a) opposite an elec- tric field, (b) in the same direction…

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Q: 7) Calculate translational kinetic energy of a non-relativistic electron as a function of the…

A: We know the de Broglie wavelength is given as:λ=ph​=mvh​orv=mλh​orv2=m2λ2h2​or K.E.=21​mv2=2mλ2h2​

Q: A metal which has a threshold wavelength 2.3x1°m is irradiated by a light of wavelength 1.8x1°m.…

A: Given: The threshold wavelength is 2.3x10-9 m. The wavelength of the light is 1.8x10-9 m.

Q: Which statement is TRUE about Einstein’s explanation regarding the photoelectric effect? I.    The…

A: Photoelectric effect is the emission of electron when a photon of sufficient energy falls on a metal…

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

A: given, the wavelength of electron=λ=8.76 um mass of electron=m=9.1x10-31kg According to de Broglie…

Q: 3) A proton is moving with 10^8 m/s speed. Find the De Broglie wavelength associated with the proton…

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Q: If a light of specific frequency shines on a photosensitive surface. If a brighter light of the same…

A: 1) In photoelectric effect if the intensity of light increases ( much brighter light) means no. of…

Q: piece of lead is hooked up to a circuit. When it is illuminated by a light, a stopping potential of…

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Q: (i) What is the De Broglie wavelength of an electron traveling at a speed of 1.5 X106 m/s and (ii)…

A: Thee speed of the electron is 1.5×106 m/s.

Q: In a photoelectric experiment, a metal is irradiated with light of energy 3.56 eV. If a braking…

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Q: 8. When a photoelectric surface is illuminated with light of wavelength 537 nm, the stopping…

A: We use the formula for photoelectric effect to get the required.

Q: Potassium and gold cathodes are used in a photoelectric-effect expériment. For each cathode, find:…

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Q: Q-25: Green light shining on sodium surface causes photoelectrons with maximum kinetic energies of…

A: Given that --- maximum kinetic energies = 0.02 e V. work function of sodium= 2.28 e V, Question ?…

Q: Far ultraviolet light with a wavelength of 154 nm is incident on an unknown solid surface, which…

A: The relation of the work function is given in terms of plank's constant, velocity of light,…

Q: i) Calculate the wavelength of the light. ii) Calculate the stopping potential.

A: Given, Work function of metal,W=3.2×10-19J Speed of ejected electrons,v=8×105m/s

Q: A lamp that emits photons of wavelength 200nm is used un a photoelectric effect demonstration.…

A: Wavelength of photon, C= 200 nm  Area of plate, A = 0.01 m Current produced, I = 5 mA Number of…

Q: ne: (masselectron = 9.11 X 10-31 kg) i) The maximum kinetic energy of the photoelectron. ii) The…

A: Given values:- Potential difference,(V)=3 Volt ----(1) Mass of electron,(me)=9.11 x 10-31 kg…

Q: 12. In a photoelectric experiment, a student obtained the following data: TT Frequency of Radiation…

A: Given information:

Q: In a photoelectric effect experiment the threshold wavelength of light is 380 nm. If the wavelength…

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Q: The stopping potential for photoelectrons emitted from a surface illuminated by light of…

A: a) Write the equation of the photoelectric effect and apply the first equation.

Q: A particle has a de Broglie wavelength of 3.0 × 10-10m. Then its kinetic energy increases by a…

A: The de Broglie wavelength Increment of kinetic energy by a factor

Q: What is the maximum amount by which the wavelength of an incident photon could change when it…

A: Atomic mass of the molecule, m=53.0u=53.0×(1.66×10-27kg)=8.798×10-26kg

Q: Does a photon have a de Broglie wavelength? If so, how is it related to the wavelength of the…

A: Asked : Does a photon have a de Broglie wavelength? If so, how is it related to the wavelength of…

Q: A 2x10-12 m wavelength photon strikes a stationary electron and Compton scatters at and angle of 60…

A: c) Determine the speed of an electron. Determine the momentum of the electron.

Q: b) Elaborate why classical physics cannot explain the photoelectric phenomena.

A: The absence of a lag period, the independence of the kinetic energy of photoelectrons from the…

Q: 4) The minimum frequency for the photoelectric effect to occur in a given metal is 5 x 10¹4 Hz. a)…

A: Given: Minimum frequency (fο) = 5 × 1014HzTo find: a) Work function of the metal (W)             b)…

Q: d)     In a photoelectric experiment using a photocell, the graph of stopping potential Vs against…

A: The threshold frequency is the minimum frequency for which the ejection of the photo electrons takes…

Q: On a photosensitive material, when frequency of incident radiation increased by 30%, kinetic energy…

A: To find-Work function (ϕ)=?Given-(Initial) K.E.=E1=0.4 eV(Final) K.E.=E2=0.9 eV

Q: Potassium and gold cathodes are used in a photoelectriceffect experiment. For each cathode, find:a.…

A:

Q: In a photoelectric experiments, a graph of the light frequency f is plotted against the maximum…

A: It is required to calculate the wavelength and the velocity for the given frequency.

Q: (a) What is the kinetic energy of the emitted electrons at this frequency? (b) What happens to the…

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Q: The work function of K is 2.2 eV (a) Calculate the threshold frequency and wavelength (b) Will…

A: work function of k = 2.2 eV

Q: Question 18 A photon having wavelength A scatters off a free electron at A (see figure), producing a…

A: