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Atomic and Nuclear Physics
calculate how thick an absorber needs to be absorbed half of the incoming ligh
Atomic and Nuclear Physics
calculate the instantaneous speed of an apple that falls freely from a rest position and accelerates at 10m/s^2 for 1.5 seconds
Atomic and Nuclear Physics
Calculate the mass defect and binding energy per nucleon for a lithium nucleus (3 7 Li):
Mass of lithium nucleus (M) = 7.000000 u
Mass of proton (mp) = 1.007825 u
Mass of neutron (mn) = 1.008665 u
1 u = 931 MeV
Mass of lithium nucleus (M) = 7.000000 u
Mass of proton (mp) = 1.007825 u
Mass of neutron (mn) = 1.008665 u
1 u = 931 MeV
Atomic and Nuclear Physics
If an object has an initial position
(x1, y1) = (5.0 m, 9.0 m),
and an initial velocity
(v1x, v1y) = (2.0 m/s, −9.0 m/s),
what is the final position vector
(x2, y2)
of the object if its two-dimensional acceleration is described by the graphs in the figure below? (Express your answer in vector form in metres.)
(x1, y1) = (5.0 m, 9.0 m),
and an initial velocity
(v1x, v1y) = (2.0 m/s, −9.0 m/s),
what is the final position vector
(x2, y2)
of the object if its two-dimensional acceleration is described by the graphs in the figure below? (Express your answer in vector form in metres.)
Atomic and Nuclear Physics
explain double diffraction
Atomic and Nuclear Physics
1. a) Calculate the ionisation energy of rubidium per atom, if light of wavelength 5.84 x 10 raised to the power of -8 m produces electrons with a speed of 2.450 x 10 raised to the power of 6 m/sec.
[Hint: Assume that the threshold frequency refers to the frequency corresponding to the ionisation energy.]
b) Assume that the electron in Li raised to the power 2+ ion is in third orbit. Calculate
i) the radius of the orbit and,
ii) the total energy of the electron.
[Hint: Li raised to the power 2+ ion also has atomic spectra similar to hydrogen atom. While applying relevant equations, use Z = 3.]
[Hint: Assume that the threshold frequency refers to the frequency corresponding to the ionisation energy.]
b) Assume that the electron in Li raised to the power 2+ ion is in third orbit. Calculate
i) the radius of the orbit and,
ii) the total energy of the electron.
[Hint: Li raised to the power 2+ ion also has atomic spectra similar to hydrogen atom. While applying relevant equations, use Z = 3.]
Atomic and Nuclear Physics
Draw a curve of binding energy per nucleon as a function of mass number. With the help
of this curve, explain the process of fission and fusion.
of this curve, explain the process of fission and fusion.
Atomic and Nuclear Physics
Write down the wave functions (i) ψ210 and (ii) ψ300 for the hydrogen atom. Obtain the
expectation value of r for the ground state hydrogen atom.
expectation value of r for the ground state hydrogen atom.
Atomic and Nuclear Physics
The half-life of radon is 3.82 days. How long will it take for 60 percent of a
sample of radon to decay?
sample of radon to decay?
Atomic and Nuclear Physics
Neutral hydrogen atoms are moving along the axis of a vacuum tube with a speed of
2.0 × 106 ms−1. A spectrometer receives light emitted by these atoms in the direction
of their forward motion. If emitted from hydrogen atoms at rest, this light would
have a measured wavelength of 486.13 nm. Calculate the expected wavelength for
light emitted from the approaching atoms, using the relativistic formula.
2.0 × 106 ms−1. A spectrometer receives light emitted by these atoms in the direction
of their forward motion. If emitted from hydrogen atoms at rest, this light would
have a measured wavelength of 486.13 nm. Calculate the expected wavelength for
light emitted from the approaching atoms, using the relativistic formula.
