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Modern Physics - Quantum Mechanics - SS2 Physics Past Questions and Answers - page 1

1

According to wave-particle duality, particles can exhibit both particle-like and wave-like properties. Which experiment provides evidence for this phenomenon?

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A

Young's double-slit experiment

 

B

Photoelectric effect

 

C

Compton scattering

 

D

Davisson-Germer experiment

2

The uncertainty principle, formulated by Werner Heisenberg, states that there is a fundamental limit to the simultaneous precision with which certain pairs of physical properties can be known. Which properties does the uncertainty principle apply to?

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A

Position and momentum

 

B

Energy and time

 

C

Spin and charge

 

D

Mass and velocity

3

The uncertainty principle states that as the uncertainty in the measurement of one property decreases, the uncertainty in the measurement of the other property:

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A

Also decreases

 

B

Increases

 

C

Remains constant

 

 

D

Becomes irrelevant

4

The wave-particle duality is most pronounced for particles with:

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A

High energy

 

B

Low energy

 

C

Large mass

 

 

D

Small mass

5

Which of the following phenomena demonstrates the wave-like behaviour of particles?

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A

Diffraction

 

B

Photoelectric effect

 

C

Compton scattering

 

D

Electron tunnelling

6

The uncertainty principle implies that it is impossible to simultaneously know the exact:

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A

Position and velocity of a particle

 

B

Energy and frequency of a wave

 

C

Momentum and spin of a particle

 

D

Wavelength and amplitude of a wave

7

The wave-particle duality suggests that particles can exist in:

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A

Only one location at a time

 

B

Multiple locations simultaneously

 

C

Only one energy state

 

D

Multiple energy states simultaneously

8

The mathematical description of wave-particle duality is provided by:

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A

Newton's laws of motion

 

B

Maxwell's equations

 

C

Schrödinger's equation

 

 

D

Einstein's theory of relativity

9

Explain the concept of wave-particle duality and provide examples of experiments that support this idea.

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10

Describe the uncertainty principle and its implications on the simultaneous measurement of certain physical properties.

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