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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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If is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength then for 1.5 p momentum of the photoelectron, the wavelength of the light should be
(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function)
(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function)
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Correct option: A
Option A () is correct because the kinetic energy is proportional to , and the wavelength is inversely proportional to the square root of the kinetic energy.
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Reason: The oscillating electric and magnetic fields produced by oscillating charged particles are parallel to each other and both are perpendicular to the direction of propagation of the wave. S-I: The orbital has maximum electron density along the y axis and its nodal plane is xz plane.
S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
S-II: The element helium was discovered in the sun by spectroscopic method. In which one of the following, the number of protons is greater than number of neutrons but number of protons is less than the number of electrons?