Matter Waves-Wave Nature of Particle NEET Questions

Physics - Dual Nature of Matter and Radiation

Matter Waves-Wave Nature of Particle MCQ Questions


1.
The waves associated with moving material particles are called:
A.
Gravitational waves
B.
Matter waves (or de Broglie waves)
C.
Sound waves
D.
Electromagnetic waves
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ANSWER :
B. Matter waves (or de Broglie waves)
2.
The dual nature of matter — wave AND particle aspects — is captured in the de Broglie relation through:
A.
λ (a wave attribute) = h / p (a particle attribute)
B.
F = ma (Newton's second law)
C.
E = mc² (mass-energy equivalence)
D.
PV = nRT (ideal gas law)
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ANSWER :
A. λ (a wave attribute) = h / p (a particle attribute)
3.
The wave nature of matter was originally proposed by analogy with which entity?
A.
Sound waves traveling through media
B.
Photons (which are wave-particle quanta of light)
C.
Mechanical oscillators like pendulums
D.
Surface waves on water
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ANSWER :
B. Photons (which are wave-particle quanta of light)
4.
The de Broglie hypothesis was experimentally verified for electrons by:
A.
Compton (1924) using X-ray scattering
B.
Hertz (1887) using spark gap experiments
C.
Davisson and Germer (1927) using diffraction from a nickel crystal
D.
Millikan (1916) using photoelectric measurements
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ANSWER :
C. Davisson and Germer (1927) using diffraction from a nickel crystal
5.
The Davisson-Germer experiment used electrons of approximately what kinetic energy?
A.
About 54 keV
B.
About 54 eV
C.
About 5.4 GeV
D.
About 54 MeV
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ANSWER :
B. About 54 eV
6.
G.P. Thomson independently confirmed electron wave nature in 1927-28 by:
A.
Direct microscopic observation of electrons
B.
Magnetic deflection of cathode rays
C.
Diffraction of electrons through thin metal foils
D.
Photoelectric effect on gold films
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ANSWER :
C. Diffraction of electrons through thin metal foils