Question

Calculate the de-Broglie wavelength of a proton of kinetic energy 500 eV. The mass of proton is 

.

Solution

Correct option is

The de-Broglie wavelength of a particle of mass m and kinetic energy K is given by   

         

Here, 

                  

   

          .

SIMILAR QUESTIONS

Q1

What is the de Broglie wavelength of an electron of energy 1800 eV? Mass of electron  and Planck’s constant .

Q2

Moving with the same velocity, which of the following has the longest de Broglie wavelength? 

Q3

The de Broglie wavelength of an electron moving with a velocity  is equal to that a photon. The ratio of the kinetic energy of the electron to that of the photon is 

Q4

The distance of the closest approach of an alpha particle fired at a nuclear with momentum p is r0. The distance of the closest approach when the alpha particle is fired at the same nucleus with momentum 2p will be   

Q5

In the Bohr model of the hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in a quantum state n is

Q6

The mass per nucleon in a heavy hydrogen atom is

Q7

When high energy alpha-particle  pass through nitrogen gas, an isotope of oxygen is formed with the emission of particles named x. The nuclear reaction is

           

what is the name of x?

Q8

The distance of the closest approach of an alpha particle fired at a nucleus with kinetic energy K is 0. The distance of the closest approach when the alpha particle is fired at the same nucleus with kinetic energy 2K will be

Q9

 

Calculate de-Broglie wavelength for electron and proton moving with same speed of 105 ms–1.

Q10

For what kinetic energy of a neutron will the associated de-Broglie wavelength be ? The mass of neutron is