  # Dual Nature Of Radiation And Matter

## Choose the correct statement

A
Any charged particle in rest is accompanied by matter waves.
B
Any uncharged particle in rest is accompanied by matter waves.
C
The matter waves are waves of zero amplitude.
D
The matter waves are waves of probability amplitude.
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## An electron of charge 'e' and mass 'm' is accelerated from rest by a potential difference 'V'. The de Broglie wavelength is

A
Directly proportional to the square root of potential difference.
B
Inversely proportional to the square root of potential difference
C
Directly proportional to the square root of electron mass
D
Inversely proportional to the cube root of electron mass
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## In photo-electric effect, when photons of energy are incident on a metal surface, electrons are emitted with some kinetic energy. It is possible to say that

A
All ejected electrons have same K.E. equal to
B
The ejected electrons have a distribution of K.E. from zero to
C
The most energetic electrons have K.E. equal to
D
All ejected electrons have K.E. equal to
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## Two photons, each of energy 2.5 eV are simultaneously incident on the metal surface. If the work function of the metal is 4.5 eV, then from the surface of the metal

A
Two electrons will be emitted
B
Not even a single electron will be emitted
C
One electron will be emitted
D
More than two electrons will be emitted
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## The graph between the de Broglie wavelength and the momentum of a photon is a

A
Rectangular hyperbola
B
Circle
C
Parabola
D
Straight line
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