If the velocity of the electron in Bohr's first orbit is `2.19 xx 10^6 ms^-1`, calculate the de Broglie wavelength associated with it.

Dual behaviour of matter proposed by de Brolie led to the discovery of electron microscope often used for the highly magnified images of biological molecules and other type of material. If the velocity of the electron’ in this microscope is 1.6 xx 10^6 ms^-1 , calculate de Broglie wavelength associated with the neutron.

The kinetic energy of an electron is 500 eV. Calculate the de-Broglie wavelength associated with it.

An electron is moving with a velocity of 0.25 c and rest mass is 9.1 xx 10^-31 kg . Calculate the de Broglie wavelength linked with the electron.

Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Groglie wavelength associated with the electron revolving around the orbit.

Energy of an electron in the first Bohr orbit is -13.6eV. Hence calculate the energy of the electron in second orbit.

Calculate the de Broglie wavelength of an electron accelerated through 20,000 V.

The velocity of the electron in the 1st Bohr orbit has a radius 0.53 A^@ is 2200 km//s . Calculate the frequency of revolution of the electron in the same orbit.

Calculate the wavelength of an electron moving with a velocity of 2.05 xx 10^7 ms^-1 .

The energy of a photon is 10 xx 10^-19J .Calculate its wavelength.

The work function of silver is 5.26 xx 10^-19J . Calculate its threshold wavelength.