De Broglie Waves NEET Questions

Physics - Dual Nature of Matter and Radiation

De Broglie Waves MCQ Questions


13.
Which experiment first confirmed the wave nature of electrons?
A.
Davisson-Germer experiment
B.
Young’s double-slit experiment
C.
Photoelectric effect experiment
D.
Michelson-Morley experiment
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ANSWER :
A. Davisson-Germer experiment
14.
If the kinetic energy of an electron is increased, what happens to its de Broglie wavelength?
A.
It increases
B.
It decreases
C.
Remains the same
D.
It fluctuates
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ANSWER :
B. It decreases
15.
Which of the following statements is correct about de Broglie’s hypothesis?

NEET - 2017

A.
It applies only to photons
B.
It applies only to charged particles
C.
It applies to all moving particles
D.
It applies only to macroscopic objects
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ANSWER :
C. It applies to all moving particles
16.
Which of the following relations represents the de Broglie wavelength?
A.
λ = h/p
B.
λ = h/mv
C.
λ = h/√(2mE)
D.
λ = hv/m
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ANSWER :
C. λ = h/√(2mE)
17.
A neutron and a proton have the same kinetic energy. Which has a longer de Broglie wavelength?
A.
Neutron
B.
Proton
C.
Both have the same wavelength
D.
Proton has a longer wavelength
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ANSWER :
A. Neutron
18.
For a charged particle moving in an electric field, its de Broglie wavelength:
A.
Increases with speed
B.
Remains constant
C.
Decreases with increasing energy
D.
Becomes zero
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ANSWER :
C. Decreases with increasing energy