1. A beam of protons, each with kinetic energy of 40 MeV, approaches a potential step of 30 MeV. a) What fraction of the beam is reflected and what fraction is transmitted? b) Does your answer change if the particles are electrons?

Q: Calculate the shortest wavelength of light emitted by the hydrogen atom.

A: Wavelength

Q: What is the wavelength (in nm) of EM radiation that ejects 3.56 eV electrons from calcium metal,…

A: Given data: -  The kinetic energy is KE = 3.56 eV. The binding energy is BE = 2.71 eV.

Q: A small space yacht, mass 9.15X10' kg, is passing hear a large star wnen Iits englnes suddenly fall.…

A: Concept used: Photons strike the surface at speed of light to propel and basic kinematics is used.

Q: What is the second level energy of an electron (m=9.11x10-31kg) that is confined to a space of…

A: The second level energy of the electron. given, mass of electron(m)=9.1×10-31 kg Energy level(n)= 2…

Q: 4- 1R of X-ray radiation in the energy range of 0.1-3 MeV produces how many rads in muscle tissue?…

A:

Q: The "size" of the atom in Rutherford's model is about 1.0 x 10-10 m.

A:

Q: Suppose an x-ray tube produces x-rays with a range of wavelengths, the shortest of which is 0.905…

A:

Q: Q. (b) Find out the cross-section of scattering of slow neutron by proton when triplet scattering…

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Q: A radioactive nucleus undergoes gamma decay. How large would you expect the energy of the emitted…

A: The binding energy of a nuclei is in the range of several MeV, i.e in terms of mega electron volts.…

Q: Suppose light is incident on a clean piece of metal, and the stopping potential for the electrons…

A: For the photoelectric effect The kinetic energy of the electrons is given by KE = eVo Where KE =…

Q: an electron in a He+ ion is orbiting the nucleus at a distance of "0.265" A. what is the electron…

A: The distance of electron (radius of electron orbit) of the He+ ion r=0.265 A0=0.265×10-10 m The…

Q: A box contains 10 indentical atoms with he following velocities. Find its Vrms

A:

Q: 5. (a) Derive the Larmour radiation formula for an accelerated point charge moving with…

A: The objective of the question is two-fold. Firstly, we need to derive the Larmour radiation formula…

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: Electron moves from n =3 to n=2  a) calculate change in energy of the electron in joules  b)…

A: calculate the change in energy of an electron moving from energy level n=3 to n=2For n=3 , energy E…

Q: Q.1: The e/m value of electron is (CET-1999)

A: Solution:-Given thatelectron

Q: Consider the two x-ray spectra depicted in the figure below produced by the same x-ray machine.…

A: Adding a filter in the X-ray spectrum apparatus reduces the number of lower energy photons. This…

Q: in the 3km long stanford linear accelerator two electrons are accelerated to an energy of 2x10^10ev.…

A:

Q: An electron volt is by definition the kinetic energy gained by an electron if it is accelerated…

A: Note :- Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the…

Q: A small space yacht, mass 5.92x10* kg, is passing near a large star when its engines suddenly fail.…

A: given, mass, m=5.92x104kg L=5.1km solar constant, s=8.94x104W/m2

Q: Q1/ A CRT has an effective length of 4 Cm and distance between the plates of 3 mm. The screen has 45…

A: Given: The effective length of the plate is l = 4 cm The distance between the plate is d = 3 mm The…

Q: 16). How much energy is generated when a frequency of 2.74 e 14 Hz is created in an electron loss.

A: The energy E of a photon is given by E = hf where h the Planck's constant f is the frequency

Q: A metal surface is struck with blue light and electrons are released. If the blue light is replaced…

A: The ejection of electrons when photons hit material with energy higher than the work function of the…

Q: To excite an electron in a one-dimensional box from its first excited state to its second excited…

A:

Q: electric threshold for certain metal is 3500nm . Determine the maximum energy of the ejected photo…

A: Given data: Threshold wavelength =3500 nm Incident wavelength =2000nm

Q: 8. Now, as we decrease the brightness of the light, record the # electrons and detection time, and…

A: Here, the given data is the value of the electron detected and the detection time at different…

Q: Radius of an atomic nucleus is of the order 2.8 fm. What is the minimum energy that an electron…

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Q: Find the protons, electrons and neutrons for the following: protons %3D protons electrons %3D…

A: Find thfor the following. given: F, F- , Na, Na+1, O2-, Mg2+, Al3+, P3-

Q: Radius of an atomic nucleus is of the order 2.2 fm. What is the minimum energy that an electron…

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

Q: Determine the wavelength of a 2.5 keV electron.

A: Given: The energy of the electron is 2.5 keV. To Determine We have to determine the wavelength of an…

Q: 5. (a) Derive the Larmour radiation formula for an accelerated point charge moving with…

A: The objective of the question is two-fold. First, we need to derive the Larmour radiation formula…

Q: What is the maximum kinetic energy in eV of electrons ejected from a certain metal by 498 nm EM…

A: Wavelength is given Binding energy

Q: 2 protons are a distance apart (0.3 nm). What is the eletrical potential energy? 3.68 x 10-9 eV 7.68…

A:

Q: 5. (a) Derive the Larmour radiation formula for an accelerated point charge moving with…

A: The objective of the question is two-fold. Firstly, we need to derive the Larmour radiation formula…

Q: What is the kinetic energy of an electron that passes undeviated through perpendicular electric and…

A:

Q: A sodium atom emits a photon with wavelength 818 nm shortly after being struck by an electron. What…

A: The energy of the photon emitted from sodium when an electron jumps from the 3d state to the 3p…

Q: In an avalanche , one electron ,starting at the cathode, multiplies to 1000 over a distance of 10 mm…

A: Since more than two questions  are given,solution for the first one is provided here. Please upload…

Q: In a Millikan oil-drop experiment using a setup like shown in the Figure below, a 500-V potentia…

A: Given data V=500 Vd=2.5 cm Here, V is the voltage applied. While d is the distance between the…

Q: An electron and a 0.0380-kg bullet each have a velocity of magnitude 510 m/s, accurate to within…

A: