Dual Nature of ...

Find the wavelength of 100 $$eV$$ electron

A surface has work function 3.3 $$eV$$ . Which of the following will cause emission?

If the $$KE$$ of a free electron doubles then its de-Broglie wavelength changes by a factor

The photoelectrons emitted from the surface of sodium metal are

If a proton and an electron have the same de Broglie wavelength, the ratio of the velocity of proton to the velocity of electron will be nearly

The value of stopping potential for $$\lambda _2$$ in the following diagram is 

The necessary condition for photoelectric emission is :

The hydrogen atom emits a photon of 656.3 nm line. Find the momentum of the photon associated with it.

 A photon of energy $$h\nu$$ is absorbed by a free electron of a metal having work function $$\displaystyle \phi < h\nu.$$

The energy that should be added to an electron to reduce its de broglie wavelength from 1 nm to 0.5 nm is