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The De Broglie Explanation

De Broglie pr...

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De Broglie proposed that electron exist as dynamic wave in the atom.

A

False

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The correct option is A False

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Q. De Broglie proposed the wave nature of electrons suggesting matter waves.
Find the momentum, speed and De-Broglie wavelength of an electron with Kinetic energy of

120 e V

Dual nature of matter was proposed by de Broglie in 1923, it was experimentally verified by Davisson and Germer by diffraction experiment. Wave character of matter has significance only for microscopic particles. de Broglie wavelength or wavelength of matter wave can be calculated using the following relation:

λ = \frac{h}{m v}

m

v

' are the mass and velocity of the particle. de Broglie hypothesis suggested that electron waves were being diffracted by the target, much as

X

-rays are diffracted by planes of atoms in the crystals.

Planck's constant has same dimension as that of:

De Broglie proposed that -

The French physicist Louis de Broglie in 1924 postulated that matter, like radiation, should exhibit a dual behavior. He proposed the following relationship between the wavelength

λ

of a material particle, its linear momentum p and Planck constant h.

λ = \frac{h}{p} = \frac{h}{m v}

The de Broglie relation implies that the wavelength of a particle should decrease as its velocity increases. It also implies that for a given velocity heavier particles should have a shorter wavelength than lighter particles. The waves associated with particles in motion are called matter waves or de-Broglie waves. These waves differ from the electromagnetic wave as they
(i) have lower velocities
(ii) have no electrical and magnetic fields and
(iii)are not emitted by the particle under consideration
The experimental confirmation of the de Broglie relation was obtained when Davisson and Germer, in 1927, observed that a beam of electrons is diffracted by a nickel crystal. As diffraction is a characteristic property of waves, hence the beam of electron behaves as a wave, as proposed by de Broglie.

If proton, electron and

α

-particle are moving with same kinetic energy then the order of their de-Broglie's wavelength.

Dual nature of matter was proposed by de Broglie in 1923, it was experimentally verified by Davisson and Germer by diffraction experiment. Wave character of matter has significance only for microscopic particles. de Broglie wavelength or wavelength of matter wave can be calculated using the following relation:

λ = \frac{h}{m v}

m

v

' are the mass and velocity of the particle. de Broglie hypothesis suggested that electron waves were being diffracted by the target, much as

X

-rays are diffracted by planes of atoms in the crystals.

De-Broglie equation is obtained by combination of which of the following theories?

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