Under which scenario are quantum effects negligible? When the uncertainty in velocity is large relative to the system velocity When the de Broglie wavelength approaches the size of the system When the quantum number is very high When the temperature is low such that only a few states of the system are accessible

Q: What is the lowest energy level, in electronvolts (eV), of an electron in a one-dimensional atom…

A: The energy level of a one dimensional box is the lowest energy is for n=1.

Q: n electron accelerated by a potential difference of 100 V. What is its wavelength

A: given that  potential difference = 100 volt according to de Broglie  wave length for electron we…

Q: In the ground state of hydrogen, the uncertainty in the position of the electron is roughly 0.10 nm.…

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Q: As an electron in a one-dimensional box of length 0.600 nm jumps between two energy levels, a photon…

A: Given: The length of box is 0.600 nm. The energy of 8.36 eV.

Q: beam of electrons is accelerated across a potential of 14.40 kV before passing through two slits.…

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Q: The energy of the quantum mechanical particle in a box decreases by decreasing the box dimension…

A: E=n2h28mL2 n is the quantized energy level m is the mass of particle L is the length of box

Q: The uncertainty in position is 10 Å for a particle of mass 2 × 10−29kg. Determine the minimum…

A: The position and momentum uncertainty relation is expressed as,

Q: The positional uncertainty of an electron is 0.020 nm. What is the momentum's least uncertainty, ∆p…

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Q: An electron is confined in a harmonic potential well. A photon is emitted when the electron passes…

A: For harmonic potential well, energy of the state is given by,                 En = (n+12)ħω for 3rd…

Q: in quantum mechanics ; calculate the value of [Lz,L_]

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Q: An electron has the same momentum as the much more massive Helium nucleus. What is the relationship…

A: Given data:  The momentum of the electron is equals to the momentum of the Helium nucleus Required:…

Q: Find the kinetic energy of an electron whose de Broglie wavelength is equal to 0.61 Å, a typical…

A: Given: de Broglie wavelength of the electron is, λ=0.61 A∘=.61×10-10 m Require: The kinetic…

Q: Suppose the velocity of an electron in an atom is known to an accuracy of 2.0 X 103 m/s (reasonably…

A: Given: △v=2×103 m/s mass of an electron, m=9.1 ×10-31 kg

Q: A two-level quantum system has two non-degenerate energy levels ?0 = 0 meV and ?1 = 1 meV. Calculate…

A: The objective of the question is to calculate the average energy of a two-level quantum system with…

Q: Choose the BEST answer: In the double slit experiment, electrons are shot out of an electron gun one…

A: It is famous Young's double slit experiment. This experiment was conducted to verify the wave nature…

Q: Calculate the de Broglie wavelength of a neutron travelling at 5.000 m s-¹.

A: Since we answer up to one question, we answer the first question only. Please resubmit the question…

Q: Consider the spectral emittance for radiation from a blackbody at T=1500 K. Take an oscillator that…

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Q: Assuming that the precision in the linear momentum of a particle is equal to the particle momentum…

A: given: uncertainty in momentum is equals to its momentum ∆p=p

Q: A particle is restricted to a one-dimensional box of length L. It absorbs a photon whose wavelength…

A: Write a given values of this question.Other state of the photon jump.

Q: Let A and B be two mutually exclusive events, such that P (A) = 0.25 and P (B) = 0.35, determine:…

A: Introduction: Mutually exclusive events are called disjoint events. If two events are considered…

Q: An electron is in a one dimensional well of length L=2nm, with zero potential inside and infinite…

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Q: When an electron beam with an energy of 100 eV encounters a potential barrier with a height of 110…

A: Tunneling is a quantum mechanical phenomenon in which a low energy particle, relative to a barrier…

Q: The allowed energies of a quantum system are 0.0 eV, 6.0 eV, and 9.5 eV What wavelengths appear in…

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Q: The uncertainty in the location of a particle moving with a velocity of 7.28 x 10' m/s is double of…

A: Given data: Velocity of the moving particle v=7.28×107 m/s. The de-Broglie wavelength associated…

Q: It is observed that light of 420 nm just begins to emit photoelectrons.  What is the quantum…

A: Here light of wavelength 420 nm just begins to emit photoelectrons ,it means threshold wavelength of…

Q: an electron is trapped within a sphere that has a diameter of 6*10^-15 what is the minimum…

A: According to the Heisenberg's uncertainty principle, ∆p=h4π∆x Here, ∆p is the uncertainty in the…

Q: According to Louis de Broglie's relationship between particles and their wavelengths, which of the…

A: In 1924, de Broglie proposed that a particle could be described by a wave whose wavelength is given…

Q: peed but different momentum the same speed and the same m speed and the highest momentur

A: Given: To explain the correct statement among the given statement as,

Q: Why do electrons form an interference pattern when passing through a double slit? O They can not…

A: According Heisenberg uncertainty principle, electron is not localised. Means wave associated with…

Q: A particle A of mass 'm' and charge 'q' is accelerated by a potential difference of 50 V. Another…

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Q: An electron travelling in free space has a de Broglie wavelength of 0.37 nm. What is its kinetic…

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Q: All of the following are true for the harmonic oscillator model EXCEPT The degeneracy increases as…

A: The Schrodinger equation for a harmonic oscillator is written as -h22md2ψdx2+12mw2x2ψ=0 and energy…

Q: 6- prove that average (a + a*)² equal to (2n + 1) and the average of (a – a*)² is –(2n + 1)

A: Given: To prove that average (a+a+)2 = (2n+1) and the average of (a-a+)2 is -(2n+1)

Q: In quantum mechanics, the importance of commute operators is that We will be able to measure their…

A: Introduction: Commutators are very important in Quantum Mechanics. As well as being how Heisenberg…

Q: A modified oscilloscope is used to perform an electron interference experiment. Electrons are…

A: The kinetic energy of a particle is the energy stored in a particle due to the virtue of its motion.…

Q: What is the de Broglie wavelength of an electron accelerating from rest through a potential…

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Q: Based on Quantum physics, the condition for a bound particle like an electron in an orbit, to remain…

A: Circumference must be equal to the integral multiple of De Broglie wavelength.

Q: A particular atomic state has energy of 2.20 eV above the ground state, and has a lifetime of 2.9…

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Q: A neutron of mass m = 1.67 x 10-27 Kg is moving with a speed of 5.0 m/s. Find its De Broglie…

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