Louis de Broglie, in full Louis-Victor-Pierre-Raymond, 7
e
duc de Broglie, (born August 15, 1892, Dieppe, France—died March 19, 1987, Louveciennes), French physicist best known for
his research on quantum theory and for predicting the wave nature of electrons
. He was awarded the 1929 Nobel Prize for Physics.
What did Louis de Broglie discover?
In 1924 Louis de Broglie introduced the idea that
particles, such as electrons
, could be described not only as particles but also as waves. This was substantiated by the way streams of electrons were reflected against crystals and spread through thin metal foils.
How did de Broglie contribute to quantum theory?
Louis de Broglie (In full:Louis-Victor-Pierre-Raymond, 7th duc de Broglie) was an eminent French physicist. He gained worldwide acclaim for his groundbreaking work on quantum theory. In his 1924 thesis, he
discovered the wave nature of electrons and suggested that all matter have wave properties.
What did de Broglie explain?
De Broglie’s hypothesis of matter waves
postulates that any particle of matter that has linear momentum is also a wave
. The wavelength of a matter wave associated with a particle is inversely proportional to the magnitude of the particle’s linear momentum. The speed of the matter wave is the speed of the particle.
What is the de Broglie wavelength used for?
According to wave-particle duality, the De Broglie wavelength is a wavelength manifested in all the objects in quantum mechanics which
determines the probability density of finding the object at a given point of the configuration space
.
Is Heisenberg Uncertainty Principle?
uncertainty principle, also called Heisenberg uncertainty principle or indeterminacy principle, statement, articulated (1927) by the German physicist Werner Heisenberg, that
the position and the velocity of an object cannot both be measured exactly
, at the same time, even in theory.
Why is the wave theory of light wrong?
If light were a corpuscle, as Newton would have it, it would simply travel in a straight line through space. But if light were a wave,
it would have to interfere and diffract
when it encountered a barrier, a slit, or an “edge” to a surface. … If the prediction was absurd, the wave theory of light must be false.
What was Schrodinger’s model?
Erwin Schrödinger proposed
the quantum mechanical model of the atom
, which treats electrons as matter waves. … Electrons have an intrinsic property called spin, and an electron can have one of two possible spin values: spin-up or spin-down. Any two electrons occupying the same orbital must have opposite spins.
Did de Broglie get a Nobel Prize?
The Nobel Prize in
Physics 1929
was awarded to Prince Louis-Victor Pierre Raymond de Broglie “for his discovery of the wave nature of electrons.”
What is de Broglie’s relation?
De Broglie proposed that as light exhibits both wave-like and particle-like properties, matter to exhibit wave-like and particle-like properties. This nature was described as dual behaviour of matter. On the basis of his observations, de Broglie derived a
relationship between wavelength and momentum of matter
.
What is the main point of the de Broglie equation?
λ = h/mv
, where λ is wavelength, h is Planck’s constant, m is the mass of a particle, moving at a velocity v. de Broglie suggested that particles can exhibit properties of waves.
What does the uncertainty principle say?
The uncertainty principle says that
we cannot measure the position (x) and the momentum (p) of a particle with absolute precision
. The more accurately we know one of these values, the less accurately we know the other.
How does the Heisenberg uncertainty principle work?
Heisenberg’s Uncertainty Principle states
that there is inherent uncertainty in the act of measuring a variable of a particle
. Commonly applied to the position and momentum of a particle, the principle states that the more precisely the position is known the more uncertain the momentum is and vice versa.
Which is the de Broglie equation?
λ = h/mv
, where λ is wavelength, h is Planck’s constant, m is the mass of a particle, moving at a velocity v. de Broglie suggested that particles can exhibit properties of waves.
What is the de Broglie wavelength of a heavier particle?
Answer: The heavier particle’s de Broglie wavelength,
λ1 = h2m1K
. The lighter particle’s de Broglie wavelength, λ2 = h2m2K.
Is matter a wave or particle?
Matter is a wave
… and a particle. In the 1920s, a young physicist named Louis de Broglie made a radical suggestion: Since light has energy, momentum and a wavelength, and matter has energy and momentum, maybe matter has a wavelength, too. That’s something that’s easy to say but hard to wrap your head around.
