Advertisements
Advertisements
प्रश्न
Calculate the de-Broglie wavelength of an electron moving with one-fifth of the speed of light.Neglect relativistic effects. (`h = 6.63 xx 10^(-34)` J.s, c= `3xx10^8`m/s, mass of electron = `9 xx 10^(-31) kg)`
Advertisements
उत्तर
v = `1/5 xx 3 xx 10^8` m/s
`lambda = h/(mv)`
= `(6.63 xx 10^(-34))/(9xx10^(-31) xx 3/5 xx 10^8)`
= `1.22 xx 10^(-11)` m
= 0.122 Å
APPEARS IN
संबंधित प्रश्न
Calculate the de Broglie wavelength of an electron moving with - of the speed of light in vacuum (Negelct relativistic effect)
(Planck's constant: h = 6.63 x 10-34 Js, Mass of electron : m = 9.11 x 10-28 g)
Plot a graph showing variation of de Broglie wavelength λ versus `1/sqrtV` , where V is accelerating potential for two particles A and B, carrying the same charge but different masses m1, m2 (m1 > m2). Which one of the two represents a particle of smaller mass and why?
A proton and an α -particle are accelerated through the same potential difference. Which one of the two has greater de-Broglie wavelength Justify your answer.
A proton and an α-particle are accelerated through the same potential difference. Which one of the two has less kinetic energy? Justify your answer.
A proton and an α-particle have the same de-Broglie wavelength. Determine the ratio of their accelerating potentials
A proton and a deuteron are accelerated through the same accelerating potential. Which one of the two has the greater value of de-Broglie wavelength associated with it, and Give reasons to justify your answer.
An α-particle and a proton are accelerated through the same potential difference. Find the ratio of their de Broglie wavelength.
State how de-Broglie wavelength (`lambda`) of moving particles varies with their linear momentum (p).
Use de-Broglie's hypothesis to write the relation for the nth radius of Bohr orbit in terms of Bohr's quantization condition of orbital angular momentum ?
A deuteron and an alpha particle are accelerated with the same accelerating potential greater value of de-Broglie wavelength, associated it ?
Show on a graph the variation of the de Broglie wavelength (λ) associated with an electron, with the square root of accelerating potential (V) ?
Using de Broglie’s hypothesis, explain with the help of a suitable diagram, Bohr’s second postulate of quantization of energy levels in a hydrogen atom.
An electron, an alpha particle and a proton have the same kinetic energy.
Which one of these particles has the largest de-Broglie wavelength?
An electron of energy 150 eV has wavelength of 10-10m. The wavelength of a 0.60 keV electron is?
Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased,
A proton and an electron are accelerated by the same potential difference. Let λe and λpdenote the de Broglie wavelengths of the electron and the proton, respectively.
Answer the following question.
Obtain the expression for the ratio of the de-Broglie wavelengths associated with the electron orbiting in the second and third excited states of the hydrogen atom.
Light of wavelength 2000 Å falls on a metal surface of work function 4.2 eV.
If the same light falls on another surface of work function 6.5 eV, what will be the energy of emitted electrons?
A litre of an ideal gas at 27°C is heated at constant pressure to 297°C. The approximate final volume of the gas is?
Two bodies A and B having masses in the ratio of 3 : 1 possess the same kinetic energy. The ratio of linear momentum of B to A is:
Two bodies have their moments of inertia I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momenta will be in the ratio:
When the displacement of a particle executing simple harmonic motion is half of its amplitude, the ratio of its kinetic energy to potential energy is:
A proton is accelerated through one volt the increase in its kinetic energy is approximately
The kinetic energy of electron in (electron volt) moving with the velocity of 4 × 106 m/s will be
Number of ejected photo electrons increase with increase
The de-Broglie wavelength (λ) associated with a moving electron having kinetic energy (E) is given by ______.
