Questions in Dual Nature of Radiation and Matter

Select	Question
	The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is
	As the intensity of incident light increases
	Light of wavelength 5000 Å falls on a sensitive plate with photoelectric work function of 1.9 eV. The kinetic energy of the photoelectron emitted will be
	Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment
	The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately
	The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV. The stopping potential in volts is
	Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface
	If mean wavelength of light radiated by 100 W lamp is 5000 Å, then number of photons radiated per second are
	The frequency of the incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is
	When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters