EASY
Diploma
IMPORTANT
Earn 100
An electron orbiting a proton in the state of hydrogen has speed . The electron is put in the state of hydrogen. What is the speed of the electron in the new orbit?
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Important Questions on Quantum and Nuclear Physics (HL)
EASY
Diploma
IMPORTANT
A particle of mass is confined within a region of linear size . Which is an order of magnitude estimate of the particle’s kinetic energy?
EASY
Diploma
IMPORTANT
Two beams of electrons of the same energy approach two potential barriers of the same height. One barrier has width and the other width . Which is a correct comparison of the tunnelling probability and the de Broglie wavelength of the transmitted electrons in the two beams?
EASY
Diploma
IMPORTANT
The graph shows the wavefunction of a particle. Near which position is the particle most likely to be found?
EASY
Diploma
IMPORTANT
The activity of a pure radioactive sample is when the number of nuclei present in the sample is . Which graph shows the variation of with ?
EASY
Diploma
IMPORTANT
Alpha particles of energy are directed at a thin metallic foil made out of atoms of atomic number . For what values of and are deviations from Rutherford scattering likely to be observed?
EASY
Diploma
IMPORTANT
Which is evidence for the existence of nuclear energy levels?
EASY
Diploma
IMPORTANT
State one feature of the photoelectric effect that cannot be explained by the wave theory of light.
EASY
Diploma
IMPORTANT
Describe how the feature of the photoelectric effect that cannot be explained by the wave theory of light is explained by the photon theory of light.
