Questions in Dual Nature of Radiation and Matter

Select	Question
	Einstein got Nobel prize on which of the following works
	The photo-electrons emitted from a surface of sodium metal are such that
	A metal surface of work function 1.07 eV is irradiated with light of wavelength 332 nm. The retarding potential required to stop the escape of photo-electrons is
	In a photo cell, the photo-electrons emission takes place
	When light falls on a metal surface, the maximum kinetic energy of the emitted photo-electrons depends upon
	The electrons are emitted in the photoelectric effect from a metal surface
	The work function of a metal is 4.2 eV, its threshold wavelength will be
	The number of photo-electrons emitted per second from a metal surface increases when
	The work function of metal is 1 eV. Light of wavelength 3000 Å is incident on this metal surface. The velocity of emitted photo-electrons will be
	The retarding potential for having zero photo-electron current